One problem related to anti-theft controller has been reported for the 2004 GMC Canyon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 GMC Canyon based on all problems reported for the 2004 Canyon.
My 2004 GMC Canyon has, for the past year, quit starting due to anti theft passlock system installed on truck. I have on two separate occasions thus far been involved in an emergency situation that could have been further prevented but the anti theft passlock stopped me from starting the vehicle. This specifically is a widespread problem that gm is aware of and has made no recall to date on the issue. There are safety and emergency situations being caused by this defect. Please research and assist any way possible.