While driving the doors start to lock and unlock repeatedly, all of the lights flash on the dash, the radio clock resetes to 12:00 and the date goes to 1/1/2004. weird thing is that the stations stay in memory. sometimes everything shuts off when you turn the key off before you open the door, and sometimes when you try to start the truck it turns over and then stops like it had started but the engine is not running. today it didnt even respond when i turned the key over for about a full second or two and then it started. any ideas? dealer said the electronic brake controller was loosing communication. i dont buy that as the culprit, maybe as a result but not the cause. it even down shifted to 2nd and 3rd when it happened once which caused the rear tires to skid while i was going 60. very dangerous.
SOURCE: Rear door won't stay shut
Check the latch mechanism on the door. There is a piece of the latch that closes around the clasp on the door frame. sometimes this closes when the door is open and you can't shut the door. Take a screw driver and flip this latch piece open and close the door.
SOURCE: 2007 chevy avalanche electrical issues
You need to remove the carpet on the passengers side and check the wireing harness,take off the tape and visually inspect it.You are likely to find broken splices ,bare wires or wires shorted to each other or to ground.
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