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Hi, I have a 99 Suburban with 6.5 Turbo. I ran over 200 thousand miles on home heating oil. No problems. Before that i had a 89 suburban with the 6.2 diesel. Same thing. over 200 K & no problems. The Military Hummers with the 6.2 & 6.5 diesels run on anything. Same engines.

Hi ! I am looking to buy a1998 GMC turbo diesel 6.5 l with a 4L80E transmission.. the pick-up have some difficulty to shift on third gear it need Higher rpm.the Truck is in good shape. I think it is the speed vss,the rpm and the sppedometer are intermittent.

Hi , is there a way to get the Tech Library working? Thanks.

2013 LML SLE 4wd need stock tune if possible
I have an Flash Scan coming and have been to the GM site to get calibration numbers.
How do I match up the numbers found there to the numbers in the controller?

I have a 1996 Chevy 1500 2wd Shortbed ….im doin a 4l80e swap an Need a few answers….