Yukon/Denali 2WD V8-4.8L VIN V (2005)
Wiring Harness: All Technical Service Bulletins
Electrical - No Module Communication/DTCs/Warning Lamps
Bulletin No.: 03-08-50-014A
Date: January 20, 2006
TECHNICAL
Subject:
No Communication with Any Modules, Memory Seat May Not Recall, Multiple U-DTCs Set or Instrument Panel Cluster (IPC) Warning Indicators,
Crank No Start (Inspect/Repair Affected Wiring Harness)
Models:
2003-2006 Cadillac Escalade, Escalade ESV, Escalade EXT
2003-2006 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2003-2006 GMC Sierra, Yukon, Yukon XL
with Front, Individual (Non-Bkt) Seat (RPO AN3) and/or Active Brake Control (Stabilitrak(R)) (RPO JL4)
Supercede:
This bulletin is being revised to update the various conditions and add the 2004-2006 model years, additional diagnostic and warranty information.
Please discard Corporate Bulletin Number 03-08-50-014 (Section 08 - Body & Accessories).
Condition
Some customers may comment on any of the following conditions:
^
Various IPC Warning indicators are coming on.
^
Driver Information Center (DIC) displays "Unknown Driver".
^
Memory seat may not recall.
^
RKE fobs may be inoperative.
^
Radio or HVAC may shut off.
^
Engine cranks but will not start.
Upon investigation, the Technician may find multiple U-DTCs set.
Cause
On RPO AN3 equipped vehicles, a chafed or pinched seat wiring harness under the driver seat may be a cause of this condition. Because of the routing, a
portion of the seat wiring harness may rest on the inboard edge of the seat track or frame. Over time, the harness may be pinched or chafed because of
the seat movement. Refer to the above illustration. The illustration shows the inverted position of the seat bottom. The arrow shows the primary location
