Is my Duramax LLY or LBZ?
Duramax VIN Chart
| Model Year(s) | 8th Digit of VIN | Duramax Model & Notes |
|---|---|---|
| 2001 – 2004 | 2 | LLY (introduced midyear 2004) |
| 2005 | 2 | LLY (only engine offered for 2005) |
| 2006 | 2 | LLY (2006 version, different from 2005 version) |
| D | LBZ (introduced late 2006) |
What year is a LLY Duramax?
2004-
LLY Duramax Specifications Chart
| Manufactured Years: | 2004-2006 |
|---|---|
| Stroke: | 3.897″ or 99 mm |
| Block Material: | Cast Iron |
| Cylinder Head: | Cast Aluminum |
| Crankshaft: | Forged Steel |
How to identify a Duramax engine by VIN number?
Duramax Engine ID by VIN Number. Many model years were crossover or transitional years for the Duramax diesel, thus it is often necessary to decipher the engine model/version using the vehicle’s VIN number. The chart below may be used to identify which Duramax engine your truck has based on the 8th digit of the vehicle identification number (VIN).
Is the LLY Duramax the same as the LB7?
Similar to the LB7, the LLY Duramax is reliable, powerful, and lacks most of the emissions found on modern day diesel trucks like the L5P. LLY Duramax trucks don’t suffer from the same injector failure problems that LB7 trucks frequently had. Instead, many LLY Duramax problems stem from overheating.
How many horsepower does a GM LLY have?
It was a stepping stone for GM as they begun to encounter stricter emissions requirements thanks to the federal government and California. Despite the added emissions, the LLY was very powerful and capable for the time producing 310 horsepower and 605 lb/ft of torque. It was mated to a 5-speed Allison Transmission in years 2004 and 2005.
When did the LLY Duramax go to 6 speed?
It was mated to a 5-speed Allison Transmission in years 2004 and 2005. In 2006, the Allison Transmission was upgraded to a 6 speed. Although our LLY Duramax specifications chart above does mention the turbocharger found on these trucks, it doesn’t mention the fact that these are one of the largest turbochargers found on any Duramax today.