Lbz or lly - Diesel Truck Forum -
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post #1 of 4 (permalink) Old 12-29-2008, 11:18 AM Thread Starter
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Lbz or lly

How do i tell if my van is a LBZ or LLY it is a 06 duramax i am new to the diesel game
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post #2 of 4 (permalink) Old 12-30-2008, 12:14 AM
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IIRC the dmax in the 06 vans are strictly LLY, and i believe they are de-rated to 280 or 290hp...

Aaron the Crazy Canuck
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post #3 of 4 (permalink) Old 01-08-2009, 12:25 AM
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I think Aaron is correct.

8th digit of the VIN will be D for a LBZ and 2 for LLY.

2007 Chevy LBZ 6.6L Classic

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post #4 of 4 (permalink) Old 01-08-2009, 01:52 AM
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Look on the VIN for the 8th digit for engine ID.

1 - LB7 (2001-2004.5)
2 - LLY (2004.5-05)
D - LLY/LBZ [note: The LLY of these years is actually an LBZ with different tuning. So check the build date (IIRC on the drivers door) before you buy. IIRC, the switch was in Jan of 2006.]
6 - LMM

Allison trannys were 5 speeds 2001-2005. 2006-up are 6 speeds with tap shift.

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