Duramax VIN Engine Identification

Identifying Duramax Engine Version Using The VIN Number

 

The following tables will help you identify which Duramax diesel engine a truck has based on the 8th digit of the vehicle identification number (VIN).

2001 - 2004 VIN Number Engine Identification:

8th Digit of VIN Number Duramax Engine Generation:
1 LB7
2 LLY (the LLY was introduced mid-year in 2004)

 

2005 VIN Number Engine Identification:

8th Digit of VIN Number Duramax Engine Generation:
2 LLY

*The LLY was the only Duramax engine offered in 2005.

 

2006 VIN Number Engine Identification:

8th Digit of VIN Number Duramax Engine Generation:
2 LLY 2006 version
D LBZ (the LBZ was introduced late in 2006)

*the 2006 LLY features many differences from the 2005 version. View the 2006 LLY Differences for more information.

2007 VIN Number Engine Identification:

8th Digit of VIN Number Duramax Engine Generation:
D LBZ
6 LMM

 

2008 - 2010 LMM Vin Number:

The LMM was the only Duramax offered during these years. The 8th digit is a "6"

2011 LML VIN Number:

For LML equipped trucks (2011 - present model year), the 8th digit of the VIN number is a "8".

 

 

Duramax Engine Identification

    • 6.6L Duramax LB7 Specs
    • 6.6L Duramax LLY Specs
    • 6.6L Duramax LBZ Specs
    • 6.6L Duramax LMM Specs
    • 6.6L Duramax LML Specs
    • Compare Duramax Generations

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