2003 Suburban Rear Door Lock problem

Tiny
MBOUL52
  • MEMBER
  • 2003 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 98,000 MILES
2003 Chevrolet Suburban Rear Doors will not lock, all doors will unlock properly.
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Sunday, April 3rd, 2011 AT 3:31 AM

8 Replies

Tiny
KHLOW2008
  • EXPERT
Have the actuators checked, they could be weak and not allowing the doors to be locked. Check lubrications and alignment of actuators.
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-1
Sunday, April 3rd, 2011 AT 4:04 AM
Tiny
MBOUL52
  • MEMBER
How would one tell if the actuators are weak. Also if the rear door relays are working correctly? Is the relay used in the power on position to unlock doors, or power off? Is this a dealer only option?
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Sunday, April 3rd, 2011 AT 5:50 PM
Tiny
KHLOW2008
  • EXPERT
The rear door lock and unlock uses different relays for locking and unlocking. Hey are located in left instrument panel fuse box (lower left side of dash). They can be tested but the easiest way is to swap them around and if problem changes to unable to unlock, then we know the relay is bad.

For actuators, you need to remove the door panel and disconnect the actuator wires and test with battery voltage.

I believe that part cn be sourced from parts outlets.
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+10
Sunday, April 3rd, 2011 AT 7:43 PM
Tiny
KHLOW2008
  • EXPERT
Sorry I forgot to attach the diagrams.
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Sunday, April 3rd, 2011 AT 7:45 PM
Tiny
MBOUL52
  • MEMBER
Your help is appreaciated. The problem was the relay, swapping the relays caused the 4 doors to lock, and only the two front unlock. I can live with that until I replace the relay. Thanks a bunch.
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Monday, April 4th, 2011 AT 11:46 PM
Tiny
KHLOW2008
  • EXPERT
You're welcome.

Have a nice day.
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Tuesday, April 5th, 2011 AT 11:56 AM
Tiny
MBOUL52
  • MEMBER
OReilly had the relay at 11.74 with tax. The car is working great now. I will use your service in the future. Great!
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Saturday, April 9th, 2011 AT 12:49 AM
Tiny
KHLOW2008
  • EXPERT
Cheers.

Have a great weekend.
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Saturday, April 9th, 2011 AT 11:29 AM

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