Greetings!
THere are several TSB's and at least one recall (01059) related to the sliding doors on this vehicle. They were recalled for broken door welds, and there are a couple TSB's related to door module failures causing the door to be inoperative.
This door has a sophisticated electronic control system that requires a Vetronix TEch-2 scan tool for diagnosis. That, coupled with the module failure problems, indicate that you will likey need to take the vehicle in to the GM dealer for diagnosis and repair. Without a scan tool capable of communicating with the body control module on the vehicle to diagnose the failure, there really is very little that can be done at home in the driveway.
I hope this is helpful; if so, na accept would be most appreciated! thanks!
Recalls and TSB's include the following titles (there may be others also):
Right Hand Power Sliding Door Interior Handle
# 04110 - (May 24, 2005) (Recall)
Bulletin No.: 02-08-64-011
Date: May, 2002
TECHNICAL
Subject:
Power Sliding Door Reverses on Closing (Replace Plunger and Contact Plate Using Kit; Replace Door Module and Latch, If Applicable
Bulletin No.: 01059
Date: October 2001
PRODUCT SAFETY RECALL
SUBJECT:
01059 - POWER SLIDING DOOR
Bulletin No.: 00-08-64-015A
Date: February 2001
TECHNICAL
Subject:
Power Sliding Side Door Edge Guard Comes Loose
(Install New Edge Guard)
Bulletin No.: 99-08-64-017
Date: September, 1999
TECHNICAL
Subject:
Upper Roller Bracket Rattle (Install Bumper)
Bulletin No.: 83-15-25
Date: December, 1998
Subject:
Inoperative Power Sliding Side Door - GEN II Only (Replace Control Module)