2007 Chevy Tahoe power door locks

REDSTROKE2

MEMBER
2007 CHEVROLET TAHOE
V8
2WD
AUTOMATIC
49,500 MILES

Power door locks on both rear passenger doors won't unlock. All doors will lock with each front door switch and with the RKE, but only the 2 front doors and rear hatch will unlock. All fuses were good. Have to unlock the 2 rear passenger doors manually. The actuators should be ok since their locking with each command, but they won't unlock. Is there a relay located somewhere that could be failing?

1 Reply

MERLIN2021

MECHANIC
17,250 POSTS

There is a Tech bulletin on your truck, in the B pillar, thats the one the door closes and latches to at drivers seat back.
Rear Door Locks/Rear Windows/Courtesy Lamps/Rear Speakers Inoperative, Blown Fuse, SIR DTC Codes (Inspect/Repair, Wrap Wire Harness) TECHNICAL SERVICE BULLETIN Reference Number(s): 06-08-44-009A, � Date of Issue: � August 04, 2008 Related Ref Number(s): 06-08-45-009, 06-08-45-009A ARTICLE BEGINNING CONDITION Some customers may comment on one or all of the following conditions: � � � Rear door locks inoperative � � � Rear windows inoperative � � � Door courtesy lamps inoperative or stay on at times � � � Rear speakers inoperative � � � Any fuse (related to the rear doors) that is blown/shorted � � � SIR codes related to the pretensioner � � � Interior dimming inoperative CAUSE The B-pillar wiring harness around the seat belt retractor may be or become chaffed/damaged. The correction listed below is intended to repair any damage and prevent future concerns. CORRECTION 1. Remove the lower B-pillar cover. 2. Disconnect the Supplemental Inflatable Restraint (SIR) connector. 3. Inspect the wiring harness in the B-pillar around the seat belt retractor. 4. Make any necessary wiring harness repairs. 5. Wrap the "entire" harness with electrical tape. 6. Install conduit tubing around the harness. 7. Install the lower B-pillar cover. Fig. 1: Identyifying Supplemental Inflatable Restraint Connector Affected Model(s): 2007-2009 Cadillac Escalade, Escalade ESV, Escalade EXT; 2007-2009 Chevrolet Avalanche, Silverado (Crew Cab Only), Suburban, Tahoe; 2007-2009 GMC Sierra (Crew Cab Only), Yukon, Yukon Denali, Yukon XL, Yukon Denali XL Supercedes: This bulletin is being revised to add model years. Please discard Corporate Bulletin Number 06-08-45-009 (Section 08 - Body and Accessories). IMPORTANT: This repair operation is intended to be done on both B-pillars. Page 1 of
Rear Door Locks/Rear Windows/Courtesy Lamps/Rear Speakers Inoperative, Blown Fuse...