Rear door locks unlock automatically, but don't lock automatically

[dewfpo]

2005, 2500HD, CCSB

The rear door locks unlock fine by the switch or automatically (when I put the truck in park), but they don't automatically lock when I hit the lock button on the door or the remote, or when the truck start to move above the set locking speed..

If I get out of the truck and hit the lock button, the front doors lock and the lights blink to indicate the alarm is armed but I can open the rear doors and the alarm doesn't go off. I have to manually lock each rear door every time I get out.

Can anyone help me solve this?

Thanks, DEWFPO

[gmtech4]

No need for duplicate threads

[dewfpo]

I thought I'd get more views posting my question in the 1500 forum as well even though my truck is a 2500. I didn't see a separate electrical forum. I didn't mean to offend anyone.

DEWFPO

[5Alive]

I don't blame you DEWFPO. This isn't a 2500 issue. It is a GM truck issue, and a very common problem. There might be someone in the 1500 forum who has solved it, and would never venture into the 2500 forum. I wish I had a solution for you, but all I have to offer is concurrence that my rear GM truck doors have the same problem.

[Hoffa]

Hey I have the same problem and I'm wondering if anyone has any answers to this question.