1999 GMC Denali. I'm trying to program a new key fob. Everyone seems to agree that I should ground pin 4 to pin 8 on the Data Link Port to go into programming mode. Mine doesn't have a usable pin in slot 8. The "hold the unlock while on-off-on-off with the key" process also doesn't seem to work either. Any thoughts?
Thursday, July 28th, 2011 AT 4:34 PM