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Re: 2004 suburban rear door locks won't lock
Posted to Technical Discussion Forum on 11/5/2010

Steve, Ditto on Roberts post. The front door locks are separate from the rear door locks, which use a LOCK relay and UNLOCK relay (same part numbers) in the left fuse panel. Swap the two relays and see if your symptoms reverse. I have replaced alot of these re... Login to read more.