2002 LS 4X4

When I bought the truck I noticed that when I put it in gear it would automatically lock the doors. It just stopped

I used to have running lights

can't get it into program mode for key fob

sometimes the lights don't come on on overhead compartment when key is off the push-button ones

my alarm used to work when I lock the door I still have a blinking light but no sound from the horn




I checked all fuses but not the relays
Truck has 150,000 miles

also have a clunking sound when I make a left turn or go over a bump

thanks for any help

 

Sounds like related to the BCM, but not to imply that it is defective and should be replaced. Needs someone technically adept to diagnose per factory information.

 

Your clucking could be a bad ball joint.

 

Since you are new, "BCM" = Body Control Module. It is one of the small electronic "brains" that runs our Blazers. You might have some bad connections in the wiring harness.