How can I tell which Duramax engine I have?
The Duramax engine has evolved from the original LB7 series to include the LLY, LBZ, LMM, LML/LGH, and now the L5P series. The simplest way to verify which series Duramax you have is interpreting the VIN# of the truck. With some exceptions, the 8th digit is the engine ID and it will either be a 1, 2, D, 6, 8, L, or Y.
How do I know if my 2004 Duramax is lly?
If the 8th digit of your VIN number is a 1, then it is a LB7 Duramax (the early engine). If the 8th digit is a 2, then it is a LLY. In mid 2004, GM switched to this newer LLY engine.
How do you decode a VIN on a Duramax?
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)….6.6L Duramax Diesel VIN ID Chart.
| Applicable Model Year(s) | 8th Digit of VIN | 6.6L Duramax Engine Variation |
|---|---|---|
| 2006 | 2 | LLY (2006 variant) |
| D | LBZ (introduced late 2006) | |
| 2007 | D | LBZ |
| 6 | LMM |
How do you tell if your Duramax is a lly or LBZ?
Look at the 8th digit of the VIN number, a “2” is an LLY an a “D” is an LBZ.
What engine is in the 2005 Duramax?
LLY Duramax Specifications Chart
| Manufactured Years: | 2004-2006 |
|---|---|
| Engine Design: | 6.6L 90-Degree V8 Turbocharged Diesel |
| Transmission: | 2004-2005: 5-Speed Auto Allison Transmission 2006: 6-Speed Auto Allison Transmission |
| Vin Identification: (8th Digit) | 2 |
| Displacement: | 6.6 Liters or 403 Cubic Inches |
What is LLY Duramax?
LLY. The LLY (internally called the 8GF1) (engine code “2”) is a 6.6 L; 403.9 cu in (6,619 cc) turbocharged engine which debuted in mid-2004 and continued until the end of 2005. It is a 32-valve design with high-pressure common-rail direct injection and aluminum cylinder heads.
What does LLY stand for on Duramax?
LLY doesnt stand for anything specific, its just the RPO (regular production order) code that means “Duramax diesel engine”.
What motor is in 2004 Duramax?
6.6L LB7 Duramax Specifications Chart
| Manufactured Years: | 2001-2004 |
|---|---|
| Engine Design: | 6.6L 90-Degree V8 Turbocharged Diesel |
| Transmission: | 5-Speed Auto Allison Transmission |
| Vin Identification: (8th Digit) | 1 |
| Displacement: | 6.6 Liters or 403 Cubic Inches |
What’s the difference between LB7 and lly?
Registered. The LLY has variable vane turbo. Injectors are easier to access. The LB7 is easier to make more power.
Which Duramax is in a 2004?
LLY
GM Duramax Turbo Diesel Engines
| Engine RPO Code | Year In Production | Chevrolet Applications |
|---|---|---|
| LLY | 2004 – 2005 | Silverado HD |
| LLY/LBZ | 2006 – 2007 | Kodiak, Silverado HD, Express |
| LMM | 2007 – 2010 | Kodiak, Silverado HD, Express |
| LGH | 2010 – 2017 | Silverado HD, Express |
What does the LB7 stand for?
LB7 is a 2001-2004. LLY is a 2004.5 – 2005 and a few 2006. LBZ is a 2006 – 2007. LMM is a 2008 +
How do I identify a Duramax engine?
Use the table below to identify which Duramax engine your truck has based on the 8th digit of the vehicle identification number (VIN). This is the truck’s VIN number, not the engine’s identification/serial number. The VIN number can always be found on your vehicle’s title or registration card.
Which Duramax engine do I have?
Use the table below to identify which Duramax engine your truck has based on the 8th digit of the vehicle identification number (VIN). This is the truck’s VIN number, not the engine’s identification/serial number. The VIN number can always be found on your vehicle’s title or registration card.
What is the Duramax 6600 RPO code?
Introduced in January of 2004, the RPO code LLY Duramax 6600 incorporates a number of significant technology changes. Two forces control diesel engine evolution for all engine manufacturers – Emissions compliance and market share.
How much horsepower does a 2004 Duramax 6600 have?
Way back in the fall of 2001, rumors and discussion with industry insiders pointed to a 340 horsepower Duramax 6600 for the 2004 model year. As late as a year ago, a 360 horsepower Duramax came up in a discussion.