[henrys021500hd]

A couple of times last week after driving for a short time and stopping the truck when I restarted it the clock went back to 12:00, I did not loose any radio stations? The truck is an 07 2500HD duramax. I don't know if the batteries were ever replaced. So my thought is to remove the batteries and install a spare to keep the memories in the radio, and take them in to have them check out. Does it matter which position I put the temp battery?
Also yesterday I went to move the truck and all I got was a clunk from the starter and after trying it for a third time the starter engaged and it started?? Thanks, Henry.

 

[MightyMax]

Sounds like a possible bad battery to me.

Get it down to Adv. Auto or Auto Zone and they can test the battery for you.

 

[GM Customer Service]

I would have to agree that the best place to start would be to check the battery. If this does not seem to solve the issue, I would recommend contacting your local dealership for more information. I can also look into this further. In order to do so, I will need the VIN for the vehicle and the current mileage. Thank you in advance.

Tricia, GM Customer Service.