Newb question about LB7 Vs. LLY - Diesel Truck Forum -
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post #1 of 3 (permalink) Old 05-01-2009, 04:52 PM Thread Starter
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Newb question about LB7 Vs. LLY

I have a PS6.0, so I am here on behalf of a friend that owns a 2004 duramax. He is having white smoke at idle and light throttle issue and asked me to look at it. I noted here this seems to be a common issue with LB7 injectors, but I noticed in 2004 the duramax went to the LLY engine.

How can I ID the engine he has?
Will GM perform the injector warranty work even though a tuner was once installed?


2003 F250 CC 2WD 6.0 January build date. >200,000 miles and running strong.
MODS include: Fuel system with adjustable regulator, SCT, 4" turbo back.
Location: North Florida, close to Tallahassee.
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post #2 of 3 (permalink) Old 05-02-2009, 12:41 AM
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Look at the 8th digit in the VIN. 1=LB7, 2=LLY

As for the tuner, its best to return the vehicle to stock before dealer visits.
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post #3 of 3 (permalink) Old 05-03-2009, 02:52 PM
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