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blab
04-24-2005, 08:55
Started my GMC 3500 with duramax and allison this morning and the service engine lightcome on. When I put it in reverse the R on the dashboard started flashing and I had no reverse. I had a friend tow me out and the truck would move in drive but in a short time it went into limp mode and I had to park it. Any help you could give is appreciated.

DmaxMaverick
04-24-2005, 11:42
Blab

You should post this in the "2500HD/3500 HD Trucks & Drivetrain" forum. Dr. Lee will probably move it there anyway. This issue you describe comes up on ocasion, and there are simple solutions that may help you. Also, try searching that forum for your symptoms. Lots of good info on it.