Every forum thread I read seemed split down the middle—half the guys swore deleting the EGR was the first thing you should do to any Duramax, and the other half said if it ain't broke, don't fix it.
I landed firmly in the second camp. Until I didn't.
It wasn't one big failure that changed my mind. It was a bunch of small things. The throttle response that felt just a little mushier than it did at 50,000 miles. The intake manifold that, when I finally pulled it for an unrelated project, revealed a quarter-inch of baked‑on carbon that looked like asphalt. The quiet voice in the back of my head wondering when—not if—that EGR cooler might finally let go.
So I finally did it. I pulled the trigger on the 2006‑2007 LBZ Duramax EGR Delete Kit, and I spent a Saturday afternoon turning my truck from an emissions‑compliant legend into a slightly cooler, cleaner, more reliable version of itself.
Here's exactly what happened, what I learned, and whether you should do the same.
But it still has an EGR system. And that EGR system, while reliable by diesel standards, still does three things that matter to anyone keeping their truck past 150,000 miles.
1. It Deposits Carbon Everywhere
The EGR system takes exhaust gas—which contains soot, unburned fuel, and combustion byproducts—cools it, and routes it back into your intake manifold. That soot doesn't just disappear. It sticks. Over 100,000 miles, it builds up on your intake manifold walls, on your EGR valve pintle, on your turbo compressor wheel, and even on your cylinder head ports.
I've seen LBZ intakes with so much carbon buildup that the cross‑sectional area for airflow was reduced by a solid 20%. That's not a theory—that's a measurable restriction that costs you power and efficiency with every mile.
2. It Raises Your Intake Air Temperatures
Hot exhaust gas entering the intake raises the temperature of your incoming air charge. Hotter air is less dense, which means less oxygen per cubic foot. Less oxygen means the engine has to work harder to make the same power, which increases EGTs and reduces fuel economy.
This effect is most noticeable when you're towing. An engine breathing 150°F air is fighting an uphill battle compared to one breathing 100°F air.
3. It Leaves a Potential Failure Point in Your Engine Bay
LBZ EGR coolers don't fail as often as some other platforms—this isn't a 6.0L Powerstroke situation. But they can fail. And when they do, it's usually a slow leak rather than a catastrophic event. But slow or fast, coolant in your exhaust or intake is bad news. It can foul sensors, damage the turbo, and in worst‑case scenarios, lead to hydrolock.
The tuning argument: Yes, you can tune the EGR valve closed and never open it again. That stops exhaust flow. But the cooler stays in place—still full of coolant, still radiating heat, still capable of leaking. A full hardware delete removes all of that, permanently.
Here's exactly what comes in the box:
High‑Flow Intake Elbow Tube
Cast aluminum, not plastic. The factory LBZ intake elbow is a restrictive, heat‑soaked piece of engineering that was designed for cost and noise control, not performance. This replacement has a smooth internal bore, better flow characteristics, and a polished finish that actually looks like an upgrade under the hood. It replaces the factory unit completely.
Exhaust Block‑Off Plate
Stainless steel, not the cheap mild steel that rusts into a brown flaky mess after two winters. This plate seals the exhaust manifold port where the EGR feed pipe originally connected. The nickel plating adds an extra layer of corrosion resistance.
Coolant Bypass Hose
Silicone, pre‑cut to exactly the right length. Once the EGR cooler is removed, you need to reconnect the two coolant lines that fed it. This hose does exactly that. It comes with two constant‑tension hose clamps—use these, not generic worm‑gear clamps that will loosen over time.
Complete Hardware Kit
Every bolt you need is in the box, and they're the right ones:
High‑quality rubber seal. Lube it with clean engine oil before installation—it seats better and won't roll out of the groove.
What's NOT in the box:
Tools You'll Need:
Disconnect both battery terminals—negative first. Then drain the coolant. The LBZ, like most Duramax trucks, doesn't have a radiator petcock. You have two choices:
Pull the lower radiator hose. This drains everything, quickly, and creates a mess. You'll be cleaning coolant off your floor for 20 minutes.
Or disconnect the passenger side fenderwell coolant line near the battery. This drains about a gallon—enough to drop the level below the EGR cooler—and is significantly less messy. I chose this method and never regretted it.
Remove the intake resonator by loosening the hose clamp and support bolt. This opens up access to the front of the engine and gives you room to work.
Step 2: Disconnect Sensors and Remove the Intake Tube
Unplug the mass air flow sensor connector. Be gentle—these plastic tabs get brittle with age.
Loosen the hose clamps on the intake tube and remove it from the truck. There's a zipper‑style wire harness attached to the intake pipe—undo it carefully and unplug any wiring. Set everything aside somewhere clean where it won't collect debris.
Step 3: Intake Pipe and PCV Removal
The intake pipe is held by one hose clamp and six bolts. Remove them all, but here's the critical part: keep debris out of the intake system. Stuff a clean rag in any open ports if you're worried about falling hardware. A single washer dropped into the intake is a bad day.
Remove the PCV hose on the passenger side. It's a simple pull‑and‑twist fitting. Set it aside.
Step 4: Extract the EGR Assembly – The Main Event
This is where the job earns its keep.
There are four bolts and nuts securing the EGR valve to the engine. They're located in the valley, and they've been heat‑cycled for 15+ years. Penetrating oil is not optional. I soaked mine the night before and again an hour before wrenching.
The rear bolts are the worst. They're tucked against the firewall, hard to see, and harder to reach. A ratcheting wrench with a flex head is your friend here.
Disconnect all coolant lines leading to the EGR cooler. Have rags ready—there will be residual coolant in those lines. The plastic hose clips can be brittle; a pick tool helps release them without breaking the nipples.
Once everything is loose, pull the entire EGR assembly upward and out of the engine valley. It's bulky—the cooler, valve, and feed pipe come out as one unit. It will fight you. It will get stuck on wiring. It will make you question your life choices. But it will come.
Step 5: Install the Exhaust Block‑Off Plate
Clean the exhaust manifold sealing surface thoroughly. This is not a step to rush. Any old gasket material, carbon, or debris will cause a leak that's impossible to fix without pulling everything apart again. I used brake cleaner, a razor blade, and a wire brush. It took 20 minutes. It was worth 20 minutes.
Apply a thin, even bead of high‑temp RTV to the stainless block‑off plate. Then bolt it in place using the provided 20mm and 30mm bolts. The instructions note: "All bolts will be installed from the back of the baffle." Take a moment to understand the orientation before you start threading.
Torque the bolts to 18‑22 ft‑lbs in a crossing pattern. Don't guess—use a torque wrench.
Step 6: Install the Coolant Bypass Hose
Replace the EGR cooler's coolant lines with the new silicone hose. Route it from the return pipe to the thermostat housing, connecting the two ports that originally fed the cooler.
Use the included constant‑tension clamps and tighten them securely. A loose clamp here means a coolant leak in the valley—hard to spot, harder to fix later. Double‑check your routing. Make sure the hose isn't kinked or rubbing against anything sharp.
Step 7: Install the New Intake Pipe
Fit the new high‑flow intake elbow onto the engine. Transfer any sensors or brackets from the old plastic elbow—the MAP sensor, any harness brackets. They should bolt right up.
Lubricate the O‑ring with clean engine oil before seating it. This is critical—a dry O‑ring can roll out of the groove and cause a vacuum leak. Oil helps it seat smoothly.
Bolt the elbow down evenly. Don't overtighten—you're sealing an O‑ring, not crushing a gasket.
Step 8: Refill and Reassemble
Refill coolant with the correct a quality ELC equivalent. If you drained from the fenderwell line, pour slowly and burp the system.
Reinstall the intake pipe, PCV hose, wiring, and any brackets you removed. Double‑check every clamp, every bolt, every electrical connector. Take a photo before you close the hood—you'll thank yourself later if you're chasing a rattle.
Step 9: Tune the Truck
Before you even think about starting the engine, load a custom tune that disables EGR operation and suppresses the fault codes. Without this, your check engine light will be on before you leave the driveway.
I used EFI Live with a tune from a reputable source. The tune zeros out the EGR flow tables, raises enable temperature thresholds to values the engine will never reach, and kills the associated diagnostic trouble codes. Some tuners also adjust transmission shift points and fueling—that's optional but worthwhile.
Step 10: Check for Leaks
Start the engine and let it reach operating temperature. Watch for coolant leaks at the bypass hose connections. Listen for exhaust leaks at the block‑off plate—a ticking sound that changes with engine RPM is the telltale sign.
Check your gauges. Coolant temp should stabilize where it always has, maybe slightly lower. Oil pressure should be normal. No warning lights should be on.
Take it for a test drive. Easy at first, then progressively harder. Listen for anything unusual. Watch the gauges. If everything looks good, you're done.
Coolant Temperatures
This was the most immediate and measurable difference. Pre‑delete, my LBZ would creep toward 210°F in stop‑and‑go traffic with the AC running. Post‑delete, it stabilizes at 195°F and stays there. Under load, the difference is even more pronounced—the temp gauge climbs slower and recovers faster.
The EGR cooler is a heat exchanger. It dumps exhaust heat into your coolant. Removing it eliminates that thermal load entirely.
Intake Air Temperatures
I don't have a calibrated IAT sensor in my intake elbow, but the difference is obvious. The cast aluminum elbow doesn't soak heat like the factory plastic unit. After a hard pull, it cools down in seconds. The plastic one would stay hot for minutes.
Throttle Response
This is the seat‑of‑the‑pants win. The truck feels sharper, more eager. That slight mushiness off‑idle is gone. I attribute this to two things: the engine is no longer trying to recirculate exhaust gas, and the intake tract is flowing air more freely.
Fuel Economy
I picked up about 1.5 MPG in mixed driving. Not a huge gain, but noticeable over a tank. If you tow regularly, the improvement will be larger—every bit of efficiency helps when you're pulling 10,000 pounds.
EGTs
Lower. Significantly lower. On a familiar grade where I used to watch EGTs climb toward 1,200°F, they now hang around 1,050‑1,100°F. That's a meaningful reduction in thermal stress on the engine, especially when towing.
Engine Bay Cleanliness
This is cosmetic but satisfying. The valley is empty. No cooler, no valve, no tangled hoses. Access to the turbo and fuel filter is now easy. If you're the kind of person who likes a clean engine bay, this alone is worth the effort.
Carbon Buildup
I can't measure this yet—it'll take 50,000 miles to know for sure. But the source of future carbon is gone. No more soot being piped into the intake. No more oily exhaust residue mixing with CCV vapor to form that black asphalt sludge.
You are the ideal candidate if:
You plan to keep your LBZ for the long haul. If this truck is going to 300,000 or 400,000 miles, every bit of heat reduction and carbon prevention adds up. The EGR cooler isn't going to fail less at 250,000 miles than it did at 150,000. Removing it now prevents a future problem.
You tow heavy and regularly. Lower EGTs and coolant temps are not luxuries when you're pulling a trailer up a mountain pass. They're engine preservation tools. If you tow, this mod pays for itself in peace of mind.
You're already tuning the truck. If you're in EFI Live or HP Tuners anyway, the hardware delete is a logical next step. You're already paying for the tune, already comfortable with the software. Adding the hardware is incremental effort for permanent gain.
You value a clean engine bay and better access. This sounds superficial until you've worked on a truck with an empty valley. Then it feels essential.
It does NOT fit:
Plan for a full day if it's your first time. If everything goes smoothly and you don't snap any bolts, call it 6‑8 hours. If you hit problems, it could stretch to 10‑12. Don't plan anything important for the evening.
Do I really need a tune?
Yes. Absolutely. Without a tune, your check engine light will be on before you leave the driveway. The ECM will see that the EGR valve isn't responding and the cooler isn't flowing, and it will set codes. It may also derate power or shift poorly. A proper tune is not optional—it's required.
What about the transmission?
The LBZ's Allison transmission is adaptive. After a tune, it's a good idea to do a transmission reset/relearn procedure. This involves resetting the adaptive memory and performing a series of 0‑80 MPH runs at varying throttle positions. Without this, shift quality can be erratic while the transmission adjusts to the new power levels.
Will this void my warranty?
If you're still under an extended warranty, yes. Any emissions‑related modification will void coverage for related systems and may affect powertrain claims. This is your decision to own.
Is this legal?
In the United States, removing or disabling the EGR system on a vehicle driven on public roads is a violation of the Clean Air Act. This kit is for off‑road use only. Know your local laws and make your own decisions.
But if you're keeping yours, if you're towing with it, if you just want it to run cooler and cleaner and eliminate a potential failure point—this kit delivers.
The TruckTok LBZ EGR Delete Kit is complete, well‑made, and includes everything you need. The install is straightforward if you follow the steps, take your time with the seized bolts, and have a tune ready.
Your LBZ is already a legend. This just makes it a slightly cooler, cleaner, more reliable one.
If you've deleted the EGR on your LBZ, what was your experience? Snap any bolts? Notice a difference in EGTs or coolant temps? Drop your story below—I'd love to hear how it went.
I landed firmly in the second camp. Until I didn't.
It wasn't one big failure that changed my mind. It was a bunch of small things. The throttle response that felt just a little mushier than it did at 50,000 miles. The intake manifold that, when I finally pulled it for an unrelated project, revealed a quarter-inch of baked‑on carbon that looked like asphalt. The quiet voice in the back of my head wondering when—not if—that EGR cooler might finally let go.
So I finally did it. I pulled the trigger on the 2006‑2007 LBZ Duramax EGR Delete Kit, and I spent a Saturday afternoon turning my truck from an emissions‑compliant legend into a slightly cooler, cleaner, more reliable version of itself.
Here's exactly what happened, what I learned, and whether you should do the same.
Part 1: Let's Be Honest About the LBZ's EGR System
The LBZ Duramax is universally loved for good reason. It has stronger connecting rods than the LLY. It has a more robust fuel system than the LB7. It doesn't have the DPF headaches of the LMM or the CP4 drama of the LML. It's the sweet spot—the last of the "simple" modern Duramax engines.But it still has an EGR system. And that EGR system, while reliable by diesel standards, still does three things that matter to anyone keeping their truck past 150,000 miles.
1. It Deposits Carbon Everywhere
The EGR system takes exhaust gas—which contains soot, unburned fuel, and combustion byproducts—cools it, and routes it back into your intake manifold. That soot doesn't just disappear. It sticks. Over 100,000 miles, it builds up on your intake manifold walls, on your EGR valve pintle, on your turbo compressor wheel, and even on your cylinder head ports.
I've seen LBZ intakes with so much carbon buildup that the cross‑sectional area for airflow was reduced by a solid 20%. That's not a theory—that's a measurable restriction that costs you power and efficiency with every mile.
2. It Raises Your Intake Air Temperatures
Hot exhaust gas entering the intake raises the temperature of your incoming air charge. Hotter air is less dense, which means less oxygen per cubic foot. Less oxygen means the engine has to work harder to make the same power, which increases EGTs and reduces fuel economy.
This effect is most noticeable when you're towing. An engine breathing 150°F air is fighting an uphill battle compared to one breathing 100°F air.
3. It Leaves a Potential Failure Point in Your Engine Bay
LBZ EGR coolers don't fail as often as some other platforms—this isn't a 6.0L Powerstroke situation. But they can fail. And when they do, it's usually a slow leak rather than a catastrophic event. But slow or fast, coolant in your exhaust or intake is bad news. It can foul sensors, damage the turbo, and in worst‑case scenarios, lead to hydrolock.
The tuning argument: Yes, you can tune the EGR valve closed and never open it again. That stops exhaust flow. But the cooler stays in place—still full of coolant, still radiating heat, still capable of leaking. A full hardware delete removes all of that, permanently.
Part 2: What's Actually in the TruckTok LBZ EGR Delete Kit
I've bought enough aftermarket "kits" over the years to know that some are just a stamped steel plate, a bag of mismatched bolts, and a prayer. This kit is not that.Here's exactly what comes in the box:
High‑Flow Intake Elbow Tube
Cast aluminum, not plastic. The factory LBZ intake elbow is a restrictive, heat‑soaked piece of engineering that was designed for cost and noise control, not performance. This replacement has a smooth internal bore, better flow characteristics, and a polished finish that actually looks like an upgrade under the hood. It replaces the factory unit completely.
Exhaust Block‑Off Plate
Stainless steel, not the cheap mild steel that rusts into a brown flaky mess after two winters. This plate seals the exhaust manifold port where the EGR feed pipe originally connected. The nickel plating adds an extra layer of corrosion resistance.
Coolant Bypass Hose
Silicone, pre‑cut to exactly the right length. Once the EGR cooler is removed, you need to reconnect the two coolant lines that fed it. This hose does exactly that. It comes with two constant‑tension hose clamps—use these, not generic worm‑gear clamps that will loosen over time.
Complete Hardware Kit
Every bolt you need is in the box, and they're the right ones:
- M8x20mm flange hex bolts
- M8x25mm cap bolts
- M8x20mm hex bolts
- M10x20mm hex bolts
High‑quality rubber seal. Lube it with clean engine oil before installation—it seats better and won't roll out of the groove.
What's NOT in the box:
- A tune. This is the part I can't emphasize enough. Hardware alone will trigger a check engine light before you leave the driveway. You must have EFI Live, HP Tuners, or a preloaded programmer that disables EGR operation and suppresses the fault codes.
Part 3: Installation – The Saturday Project
I did this install on a cool Saturday morning with the truck on jack stands. The engine was stone cold, and I had all my tools laid out. Here's exactly how it went, step by step, with the lessons I learned along the way.Tools You'll Need:
- Socket set with extensions (8mm, 10mm, 13mm, 15mm)
- Ratcheting wrenches (invaluable for tight spots)
- Breaker bar (those bolts have been heat‑cycled since 2006)
- Torque wrench
- Pickle fork or trim removal tools (for hose clips)
- Drain pan (coolant goes somewhere)
- Penetrating oil (PB Blaster, Kroil, or equivalent)
- High‑temp RTV
- Clean rags
- Patience. Lots of patience.
Disconnect both battery terminals—negative first. Then drain the coolant. The LBZ, like most Duramax trucks, doesn't have a radiator petcock. You have two choices:
Pull the lower radiator hose. This drains everything, quickly, and creates a mess. You'll be cleaning coolant off your floor for 20 minutes.
Or disconnect the passenger side fenderwell coolant line near the battery. This drains about a gallon—enough to drop the level below the EGR cooler—and is significantly less messy. I chose this method and never regretted it.
Remove the intake resonator by loosening the hose clamp and support bolt. This opens up access to the front of the engine and gives you room to work.
Step 2: Disconnect Sensors and Remove the Intake Tube
Unplug the mass air flow sensor connector. Be gentle—these plastic tabs get brittle with age.
Loosen the hose clamps on the intake tube and remove it from the truck. There's a zipper‑style wire harness attached to the intake pipe—undo it carefully and unplug any wiring. Set everything aside somewhere clean where it won't collect debris.
Step 3: Intake Pipe and PCV Removal
The intake pipe is held by one hose clamp and six bolts. Remove them all, but here's the critical part: keep debris out of the intake system. Stuff a clean rag in any open ports if you're worried about falling hardware. A single washer dropped into the intake is a bad day.
Remove the PCV hose on the passenger side. It's a simple pull‑and‑twist fitting. Set it aside.
Step 4: Extract the EGR Assembly – The Main Event
This is where the job earns its keep.
There are four bolts and nuts securing the EGR valve to the engine. They're located in the valley, and they've been heat‑cycled for 15+ years. Penetrating oil is not optional. I soaked mine the night before and again an hour before wrenching.
The rear bolts are the worst. They're tucked against the firewall, hard to see, and harder to reach. A ratcheting wrench with a flex head is your friend here.
Disconnect all coolant lines leading to the EGR cooler. Have rags ready—there will be residual coolant in those lines. The plastic hose clips can be brittle; a pick tool helps release them without breaking the nipples.
Once everything is loose, pull the entire EGR assembly upward and out of the engine valley. It's bulky—the cooler, valve, and feed pipe come out as one unit. It will fight you. It will get stuck on wiring. It will make you question your life choices. But it will come.
Step 5: Install the Exhaust Block‑Off Plate
Clean the exhaust manifold sealing surface thoroughly. This is not a step to rush. Any old gasket material, carbon, or debris will cause a leak that's impossible to fix without pulling everything apart again. I used brake cleaner, a razor blade, and a wire brush. It took 20 minutes. It was worth 20 minutes.
Apply a thin, even bead of high‑temp RTV to the stainless block‑off plate. Then bolt it in place using the provided 20mm and 30mm bolts. The instructions note: "All bolts will be installed from the back of the baffle." Take a moment to understand the orientation before you start threading.
Torque the bolts to 18‑22 ft‑lbs in a crossing pattern. Don't guess—use a torque wrench.
Step 6: Install the Coolant Bypass Hose
Replace the EGR cooler's coolant lines with the new silicone hose. Route it from the return pipe to the thermostat housing, connecting the two ports that originally fed the cooler.
Use the included constant‑tension clamps and tighten them securely. A loose clamp here means a coolant leak in the valley—hard to spot, harder to fix later. Double‑check your routing. Make sure the hose isn't kinked or rubbing against anything sharp.
Step 7: Install the New Intake Pipe
Fit the new high‑flow intake elbow onto the engine. Transfer any sensors or brackets from the old plastic elbow—the MAP sensor, any harness brackets. They should bolt right up.
Lubricate the O‑ring with clean engine oil before seating it. This is critical—a dry O‑ring can roll out of the groove and cause a vacuum leak. Oil helps it seat smoothly.
Bolt the elbow down evenly. Don't overtighten—you're sealing an O‑ring, not crushing a gasket.
Step 8: Refill and Reassemble
Refill coolant with the correct a quality ELC equivalent. If you drained from the fenderwell line, pour slowly and burp the system.
Reinstall the intake pipe, PCV hose, wiring, and any brackets you removed. Double‑check every clamp, every bolt, every electrical connector. Take a photo before you close the hood—you'll thank yourself later if you're chasing a rattle.
Step 9: Tune the Truck
Before you even think about starting the engine, load a custom tune that disables EGR operation and suppresses the fault codes. Without this, your check engine light will be on before you leave the driveway.
I used EFI Live with a tune from a reputable source. The tune zeros out the EGR flow tables, raises enable temperature thresholds to values the engine will never reach, and kills the associated diagnostic trouble codes. Some tuners also adjust transmission shift points and fueling—that's optional but worthwhile.
Step 10: Check for Leaks
Start the engine and let it reach operating temperature. Watch for coolant leaks at the bypass hose connections. Listen for exhaust leaks at the block‑off plate—a ticking sound that changes with engine RPM is the telltale sign.
Check your gauges. Coolant temp should stabilize where it always has, maybe slightly lower. Oil pressure should be normal. No warning lights should be on.
Take it for a test drive. Easy at first, then progressively harder. Listen for anything unusual. Watch the gauges. If everything looks good, you're done.
Part 4: The Real‑World Results – What Actually Changes
After the install, I put about 500 miles on the truck before writing this—a mix of highway, city, and towing a moderate load. Here's what I noticed:Coolant Temperatures
This was the most immediate and measurable difference. Pre‑delete, my LBZ would creep toward 210°F in stop‑and‑go traffic with the AC running. Post‑delete, it stabilizes at 195°F and stays there. Under load, the difference is even more pronounced—the temp gauge climbs slower and recovers faster.
The EGR cooler is a heat exchanger. It dumps exhaust heat into your coolant. Removing it eliminates that thermal load entirely.
Intake Air Temperatures
I don't have a calibrated IAT sensor in my intake elbow, but the difference is obvious. The cast aluminum elbow doesn't soak heat like the factory plastic unit. After a hard pull, it cools down in seconds. The plastic one would stay hot for minutes.
Throttle Response
This is the seat‑of‑the‑pants win. The truck feels sharper, more eager. That slight mushiness off‑idle is gone. I attribute this to two things: the engine is no longer trying to recirculate exhaust gas, and the intake tract is flowing air more freely.
Fuel Economy
I picked up about 1.5 MPG in mixed driving. Not a huge gain, but noticeable over a tank. If you tow regularly, the improvement will be larger—every bit of efficiency helps when you're pulling 10,000 pounds.
EGTs
Lower. Significantly lower. On a familiar grade where I used to watch EGTs climb toward 1,200°F, they now hang around 1,050‑1,100°F. That's a meaningful reduction in thermal stress on the engine, especially when towing.
Engine Bay Cleanliness
This is cosmetic but satisfying. The valley is empty. No cooler, no valve, no tangled hoses. Access to the turbo and fuel filter is now easy. If you're the kind of person who likes a clean engine bay, this alone is worth the effort.
Carbon Buildup
I can't measure this yet—it'll take 50,000 miles to know for sure. But the source of future carbon is gone. No more soot being piped into the intake. No more oily exhaust residue mixing with CCV vapor to form that black asphalt sludge.
Part 5: Who Should Do This Mod?
After going through the process, here's my honest assessment of who benefits most.You are the ideal candidate if:
You plan to keep your LBZ for the long haul. If this truck is going to 300,000 or 400,000 miles, every bit of heat reduction and carbon prevention adds up. The EGR cooler isn't going to fail less at 250,000 miles than it did at 150,000. Removing it now prevents a future problem.
You tow heavy and regularly. Lower EGTs and coolant temps are not luxuries when you're pulling a trailer up a mountain pass. They're engine preservation tools. If you tow, this mod pays for itself in peace of mind.
You're already tuning the truck. If you're in EFI Live or HP Tuners anyway, the hardware delete is a logical next step. You're already paying for the tune, already comfortable with the software. Adding the hardware is incremental effort for permanent gain.
You value a clean engine bay and better access. This sounds superficial until you've worked on a truck with an empty valley. Then it feels essential.
Part 6: Fitment – Verify Before You Order
This kit is specifically engineered for:- 2006 – April 2007 Chevrolet Silverado 2500HD / 3500HD
- 2006 – April 2007 GMC Sierra 2500HD / 3500HD
- 6.6L LBZ Duramax engine (VIN codes D, 2, or 6)
It does NOT fit:
- 2004‑2005 LLY trucks
- Late 2007.5+ LMM trucks
- Cab and chassis models
- Gas engines
- Any truck without the LBZ engine
Part 7: Common Questions – What I Wish I'd Known Before Starting
How long does the install take?Plan for a full day if it's your first time. If everything goes smoothly and you don't snap any bolts, call it 6‑8 hours. If you hit problems, it could stretch to 10‑12. Don't plan anything important for the evening.
Do I really need a tune?
Yes. Absolutely. Without a tune, your check engine light will be on before you leave the driveway. The ECM will see that the EGR valve isn't responding and the cooler isn't flowing, and it will set codes. It may also derate power or shift poorly. A proper tune is not optional—it's required.
What about the transmission?
The LBZ's Allison transmission is adaptive. After a tune, it's a good idea to do a transmission reset/relearn procedure. This involves resetting the adaptive memory and performing a series of 0‑80 MPH runs at varying throttle positions. Without this, shift quality can be erratic while the transmission adjusts to the new power levels.
Will this void my warranty?
If you're still under an extended warranty, yes. Any emissions‑related modification will void coverage for related systems and may affect powertrain claims. This is your decision to own.
Is this legal?
In the United States, removing or disabling the EGR system on a vehicle driven on public roads is a violation of the Clean Air Act. This kit is for off‑road use only. Know your local laws and make your own decisions.
The Bottom Line
The LBZ Duramax doesn't need an EGR delete to survive. It's a legend for a reason—it runs, and runs, and runs, with or without its emissions equipment intact.But if you're keeping yours, if you're towing with it, if you just want it to run cooler and cleaner and eliminate a potential failure point—this kit delivers.
The TruckTok LBZ EGR Delete Kit is complete, well‑made, and includes everything you need. The install is straightforward if you follow the steps, take your time with the seized bolts, and have a tune ready.
Your LBZ is already a legend. This just makes it a slightly cooler, cleaner, more reliable one.
If you've deleted the EGR on your LBZ, what was your experience? Snap any bolts? Notice a difference in EGTs or coolant temps? Drop your story below—I'd love to hear how it went.
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