Hi, check for trouble codes, if you haven't already? You should be able to get some mil codes, by using a jumper wire on the A & B terminals of data link connector. Turn the key till dash lites come on, no further. The mil start flashing, you count the flashes to get the codes. Your looking for two digit codes. Below is a generic GM datalink connector.
Friday, February 26th, 2010 AT 9:51 AM