I have a 2003 GMC Yukon with a 4.8L engine with 90,000 miles on it. Recently I purchased a Diablo Sport performance tuner and installed and my truck would not idle. I reset the truck back to stock and still same problem. The tech guys told me to change feul filter but that did not fix problem either. They say it has to be a problem with the truck and not there programmer. Any thoughts on this would help. Thank you.
have the same problem?
Tuesday, April 17th, 2007 AT 3:39 PM