Get Your L5P Duramax Engine Shipped — Fast.
Tested, low-mileage used L5P 6.6L Duramax diesel engines for Silverado & Sierra HD trucks. VIN-matched fitment, nationwide shipping, warranty included.
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Signs Your L5P Duramax Needs Replacing
If your truck is showing more than one of these symptoms, a tested replacement engine is often more cost-effective than a rebuild.
Recognize two or more of these?
Call now and we’ll help you confirm whether a replacement engine is the right call.
What Is The L5P Duramax Engine?
The L5P Duramax is GM’s 6.6-liter turbocharged diesel V8 introduced for the 2017 Chevrolet Silverado HD and GMC Sierra HD trucks. It replaced the LML Duramax and quickly became one of the most respected diesel engines in the heavy-duty truck market — initially rated at 445 horsepower and 910 lb-ft of torque, the most powerful Duramax GM had produced at launch.
Commonly found in:
- Chevrolet Silverado 2500HD
- Chevrolet Silverado 3500HD
- GMC Sierra 2500HD
- GMC Sierra 3500HD
The updated 2024+ versions received even higher output ratings. With proper maintenance, many owners report exceeding 250,000–350,000 miles — community discussions frequently cite the L5P as one of GM’s most reliable diesel platforms.
Tested L5P Duramax Engines — Ready to Ship
Every unit is pulled, inspected, and compression tested before it leaves our facility. Here’s a look at the real condition you can expect.
Common L5P Duramax Engine Problems
Turbocharger Issues
Turbocharger failures can cause power loss, excessive exhaust smoke, and unusual noises. Boost leaks and excessive exhaust temperatures are common contributors.
Fuel Injector Problems
Injector deposits and contamination can result in rough idling, poor fuel economy, stalling, and misfires. Ignoring symptoms can lead to additional engine damage.
DEF & Emissions System Faults
Modern diesel emissions systems can trigger warning lights and reduced power modes due to sensor failures or DEF-related issues — heater, quality sensor, or level sensor faults are common.
DPF Clogging
A clogged Diesel Particulate Filter can reduce performance, increase fuel consumption, and trigger regeneration issues. Severe restrictions can require professional service.
Not sure which problem you’re dealing with?
Send us your symptoms and VIN — we’ll help you figure out if replacement makes sense.
L5P Duramax Engine Specifications
| Engine Type | Turbocharged Diesel V8 |
| Engine Code | L5P |
| Displacement | 6.6 Liters |
| Fuel Type | Diesel |
| Vehicle Application | Silverado HD & Sierra HD |
| Condition | Used — Tested |
| Mileage Range | Typically 60,000–120,000 Miles |
| Warranty | 90 Days (Up To 180 Days On Select Parts) |
| Shipping | Nationwide — All 50 States |
| Fitment Verification | VIN Matched |
Why Buy Your L5P Duramax From Stark Engines?
Compression Tested
Every engine inspected before shipment
Low Mileage Inventory
Sourced from low-mileage donor trucks
VIN-Matched Fitment
Verified compatibility before shipping
Nationwide Shipping
Fast delivery to all 50 states
What Diesel Owners Are Saying
“Our L5P threw a turbo code and started smoking bad. Stark Engines confirmed fitment off our VIN same day and had a tested replacement on a truck within 48 hours. Saved us thousands versus a rebuild.”
“Called about a used L5P for my Sierra 3500. They walked me through what to check before assuming it was the engine. Ended up ordering — showed up well within the timeframe they quoted, ran great on install.”
Frequently Asked Questions
With proper maintenance, many L5P Duramax engines exceed 300,000 miles and some owners report even higher mileage.
Yes. The L5P is widely regarded as one of the most reliable Duramax engines GM has produced.
Common concerns include turbocharger issues, injector problems, DEF system faults, MAP sensor contamination, and DPF restrictions.
The L5P is found in Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD trucks.
Yes. Every engine includes a 90-day warranty, with up to 180-day coverage available on select units.
Call (888) 742-3067 with your VIN number and our team will verify compatibility before shipping — or submit your VIN through the quote form on this page.
Get Your L5P Duramax Engine Today
Tested, low-mileage, warrantied, and ready to ship. Talk to a diesel specialist now or get a free written quote.