Do you still have the crappy OEM Battery Terminal connectors? Sounds like it to me.

If so, get rid of them ASAP and replace with a quality aftermarket set.

 

No I changed them out a few years ago. I still see the passlock light flashing every once in a while.... At least I don't have to sitting and waiting 10 min any more. And it always seemed to do it at the absolute worst time!

 

I have a 2007 I had the ignition switch replaced its not that.

 

Just happened to me last week - no start - wait 10min. Scary!


Would a light lube in cylinder or key help the lock cylinder, or is it just key or cylinder wear? Dry graphite?

 

I found the problem for the delayed start on the Hummer after fixing the unneeded. I purchased my Hummer back in 2006 and had a remote start put on by the dealer. I've never had it upgraded or changed the solution was the remote alarm was malfunctioning causing the truck to not start at times. its been awhile since I had the new remote start I have no more problems. solution solved.

 

Here we go again, update to what's going on now with my H3 2007. Shift Assembly went bad, couldn't get the key out of the ignition. dealer says the solution for this is to get a Shifter Assembly, couldn't move the gear at all key locked in ignition and gears would not shift. I waited awhile (hours) than I tried again and was able to start Hummer. Suspension Stability light came on was told I need a longitudinal excellimeter suspension, for suspension in vehicle. and last but not least my radio is shot now. The radio alone costs over 1000.00. looking at the costs still beats a payment every month for a new vehicle.

 

Hey guys I'm new to the forum, I guess better late than never.
My '07 H3 has the passlock / 10 minute wait problem. This problem started for me about 3 months ago. I'm the original owner and have around 90k miles on my manual trans H3. I'm going to try replacing the passlock switch at the ignition. I found this D.I.Y. video on YouTube; Just thought I would pass on the video.

 

The switch is 40 bucks and takes ten minutes to swap out the back half of it. Another one of those spare parts to keep on hand.

 

Go to auto parts store buy new ignition switch,$70.00. Go home and remove the three Torx screws located under steering wheel shroud, it is a two piece unit that snaps together. Raise and lower steering wheel as needed to remove shroud. On left side of ignition switch you will find a black plastic unit about the size of a golf ball with an electrical connector on back side (engine side) remove connector. The passcode unit is held in place by two Phillips head screws. After they are removed and after disconnecting the battery turn the ignition key to the "on" position which will enable you to remove passcode unit. Take new ignition switch an using a large screwdriver rotate the cylinder lug ( about halfway into ignition switch housing (from the side where your key cylinder would be clockwise then passcode unit will pop off of ignition switch. plug in electrical connector and install unit on existing ignition switch with the two screws. 15 minutes, tops to do this swap. Hook up battery, jump into drivers seat. Your car must learn the new passcode lock or is it the other way around. 😳 Now try to start your engine "it won't start, DO NOT TURN OFF !!!!!! wait till lock indicator on dash stops flashing " the proverbial 10 minutes " Turn key to off position for five seconds then try to start again, it won't start, leave key on once again and repete sequence. After you do things correctly it will learn new passcode and start on the fourth attempt. 😎😜😂 I did swap three weeks ago and cured the problem. Have fun in your hassle free H3

 

This worked guys!!! Dont buy or order anything, i tried evrything that evryone recommended & nothing worked but this!!! Couldnt beleive it! After the third try, it fired rite up, no problem