I have a 2003 Chevy Tahoe that keeps giving a Engine power reduction code... I just came back from the Dealer after having the computer re-programmed... at which time it was showing the following codes...P0120, P0220, P0654, P0740, P0785, P1516, P1518, P1860, and U1026... Please help me figure this out .
May 16, 2013 at 6:51 PM
