2004 Pontiac Grand Prix Automatic Locks Cycle Repeatedly

2004 PONTIAC GRAND PRIX
70,000 MILES • 6 CYL • FWD • AUTOMATIC
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ANDORUN
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I have a 2004 Grand Prix and about a week ago when I would unlock my car using the keyless remote the car would continue to unlock itself, lock itself, pop the trunk, and would cycle through these multiple times. After driving for a few minutes this would stop, but it will do it again the next time the car is unlocked.

I switched out my keyless entry remote with the spare, and it still did it. I pulled the fuse on the keyless and just used the key manually, and it still did it. I finally pulled the fuse on the automatic locks, and although the locks and trunk have stopped cycling, I can still hear clicks/noises coming from the driver side automatic lock/window switch area.
Oct 26, 2009 at 6:40 PM
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SERVICE WRITER
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Sounds like a malfuntion in the body control module.


https://www.2carpros.com/forum/automotive_pictures/30961_gp_2.jpg

I would start by getting the codes from the bcm, then a test procedure can be done. May need to reprgram or replace the BCM, but I wouldn't jump to that conclusion until testing is done through the codes.
Oct 27, 2009 at 5:49 AM