bostterr1
10-09-2007, 07:54
have a little problem with my 1999 gmc 2500 6.5 Turbo, while driving in the range of 60-70km/h for a period of 30 minutes, i have the SES light come on and truck goes into "safe mode" always have to reset computer to erase codes, but when im on the highway going 70km/h plus the SES light will not come on, seems to go into safe mode while driving slower speeds, cant connect to the computer because the scanner says "unable to connect" so i cant even tell what my codes are, anyone have a clue please help