PDA

View Full Version : How do you identify which motor in a 04



board350
March 20th, 2009, 08:28 AM
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.

board350
March 20th, 2009, 10:16 AM
The manufacture date is 9/03 and the vin is 1GTHK23154F127004.

LBZoom
March 20th, 2009, 11:21 AM
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

chevydieselsmoker
March 20th, 2009, 12:27 PM
if its an lly you wont have the injector issues us lb7 guys do

vortecfcar
March 21st, 2009, 02:01 PM
the manufacture date is 9/03 and the vin is 1gthk23154f127004.


lb7

Pusher
April 16th, 2009, 02:04 AM
Just look on the inside of the glovebox door and find either LB7 or LLY in the list of RPO codes.

Grimme
October 27th, 2010, 10:23 AM
8th digit in the VIN is gonna be a 1 or 2
1 is LB7
2 is LLY