I am thinking of buying a 2004 Duramax and want to know how to tell if it has a LB7 or LLY? Is there any thing better of one over the other? Thanks for the input.
How do you identify which motor in a 04
I am thinking of buying a 2004 Duramax and want to know how to tell if it has a LB7 or LLY? Is there any thing better of one over the other? Thanks for the input.
The manufacture date is 9/03 and the vin is 1GTHK23154F127004.
Well, aside from looking at the vin number, the easiest way is to see if the turbo has a mechanical wastegate on the passenger side of the turbo. An LB7 has a mechanical wastegate, LLY has an electronic turbo with variable vanes inside. Also the cast intake tube going into the front of the turbo on an LB7 is round and on the LLY's it's more square I believe, at least it is on my LBZ. My dad has an LB7
if its an lly you wont have the injector issues us lb7 guys do
03 Silverado CCSB LT Summit White
417rwhp / 898trq <-old numbers need time to get on the rollers again
4" Straight Thru Exhaust, Suncoast IV W/ 1058, Amsoil everything, EFILive DSP5 tuned by me with some help from Nick, PPE lift pump, and a BD spinny thing
Just look on the inside of the glovebox door and find either LB7 or LLY in the list of RPO codes.
Signature
8th digit in the VIN is gonna be a 1 or 2
1 is LB7
2 is LLY
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Originally Posted by board350
