Canadian Hummer Club Forums

U.S. H3 owners are reporting a common problem with passlock code and failure to start. problem is with the ignition switch/key. Quick fix is to leave key in run position for 12-15 minutes to see if truck relearns code. Problem should be covered by GM as it is in the U.S. posted with thanks to Hummernetwork, Tuscon Hummer and network members

H3  sometimes will not start like it doesn't want to fire up. Wait 10 min (10 minutes to defer theft) and it starts:

H3 Passlock switch have to be replace:
 
A)  Buy  ACDelco D1403G GM Original Equipment Ignition
 
  How to replace sensor    https://www.youtube.com/watch?v=_JIIc-pB0DE
 
C)  passlock NEW SWITCH relearn procedure:
 
[font=Verdana, geneva, lucida, lucida grande, arial, helvetica, sans-serif;font-size:13.33px;background-color:rgb(223,223,223)]1. First, insert the ignition key and turn the ignition switch to the “On” position (Do not start the engine). Leave the switch on for 11 minutes. The security light may flash or be on steady during this 11 minute period. Make sure the light is no longer on or flashing before proceeding to #2 .[/font]



[font=Verdana, geneva, lucida, lucida grande, arial, helvetica, sans-serif;font-size:13.33px;background-color:rgb(223,223,223)]2. Turn the ignition switch off for 30 seconds.[/font]



[font=Verdana, geneva, lucida, lucida grande, arial, helvetica, sans-serif;font-size:13.33px;background-color:rgb(223,223,223)]3. Turn the ignition switch to the “On” position (as in step #1) for 11 minutes again.[/font]



[font=Verdana, geneva, lucida, lucida grande, arial, helvetica, sans-serif;font-size:13.33px;background-color:rgb(223,223,223)]4. Turn the ignition switch off for another 30 seconds.[/font]



[font=Verdana, geneva, lucida, lucida grande, arial, helvetica, sans-serif;font-size:13.33px;background-color:rgb(223,223,223)]5. Turn the ignition switch to the “On” position for 11 minutes a third time.[/font]



[font=Verdana, geneva, lucida, lucida grande, arial, helvetica, sans-serif;font-size:13.33px;background-color:rgb(223,223,223)]6. Turn the ignition switch off for 30 seconds one final time.[/font]



[font=Verdana, geneva, lucida, lucida grande, arial, helvetica, sans-serif;font-size:13.33px;background-color:rgb(223,223,223)]7. Turn the ignition switch to the “On” position one final time and wait 30 seconds.[/font]



[font=Verdana, geneva, lucida, lucida grande, arial, helvetica, sans-serif;font-size:13.33px;background-color:rgb(223,223,223)]8. Attempt to start the engine. If the engine starts and runs normally, the relearn is complete. If the engine does not start, check for trouble codes and address them (or disconnect battery for 10 minutes) before attempting the relearn procedure again.[/font]