Memory Power Seat Inoperative (Replace Memory Seat Module With New Design Module) (01-08-50-011A)

Publication date: 2003-10-24
Reference number: 01-08-50-011A
Supersedes refnos: 01-08-50-011

MEMORY POWER SEAT INOPERATIVE (REPLACE MEMORY SEAT MODULE WITH NEW DESIGN MODULE)

TECHNICAL SERVICE BULLETIN

Reference Number(s): 01-08-50-011A, Date of Issue: October 24, 2003

CHEVROLET:	2002 TrailBlazer Built Prior to VIN Breakpoint 22180054 or June 19, 2001
GMC:	2002 Envoy Built Prior to VIN Breakpoint 22180054 or June 19, 2001
OLDSMOBILE:	2002 Bravada Built Prior to VIN Breakpoint 22180054 or June 19, 2001
SECTION:	08 - Body and Accessories

Superceded Bulletin(s): 01-08-50-011

NOTE: This bulletin is being revised to update the Parts and Warranty Information. Please discard Corporate Bulletin Number 01-08-50-011 (Section 08 - Body and Accessories).

CONDITION

Some customers may comment that the memory seats or heated seats are inoperative.

CAUSE

A logic lock-up of the memory seat module may cause this condition.

CORRECTION

IMPORTANT: This repair is not to be performed on vehicles without memory/heated seats. In the event a vehicle without memory/heated seats has an inoperative power seat, use published Service Information for diagnosis.

DIAGNOSIS

If the seat is currently inoperable, perform the following diagnosis in order to determine if this correction is the correct repair.

Connect the Tech 2 to the vehicle.
When the main menu is displayed on the Tech 2, verify the software version that is installed in the Tech 2. If it is not software version 21.007 or later which was broadcast to dealerships on August 20, 2001, or CD received August 27, 2001, update the Tech 2.
Select Diagnostics. Press Enter.
Select model year 2002. Press Enter.
Select LD TRK, MPV, Incomplete. Press Enter.
Select Body. Press Enter.
Select LD Truck line "S" or "T". Press Enter.
Select Body Type. Press Enter.
Select Air Conditioning Type. Press Enter.
Select Driver Seat Module. Press Enter.
Select Data Display. Press Enter.
Select Input/Output. Press Enter.
If the Tech 2 does not communicate with the driver seat module ("No Communications with Vehicle Check Diagnostic Link Connector Check Ignition (On/Off)"), the module is possibly locked due to a logic lockup. Remove the LGM/DSM (Lift Glass Module/Driver Seat Module) fuse. This fuse is also the fuse for the Passenger Seat Module; 10 AMP, fuse #6 from the Rear Underseat Fuse Block.
Verify that the fuse is not open. If OK, wait 30 seconds before reinstalling the fuse.
Attempt to move the seat. If the seat now moves or the Tech 2 now establishes communication with the driver seat module, you should replace the seat module using the procedure below. If not, use normal SI service diagnostics to determine why the seat is inoperable.

MEMORY/HEATED SEAT MODULE REPLACEMENT

Replace the memory/heated seat module using the procedure listed below.

Position the driver's front seat in the full up-right position. If the seats are inoperative, you may be able to re-initialize the seat module by disconnecting the seat module wiring harness from the seat module at the front edge of the seat cushion for 30 seconds.
Remove the three screws that attach the seat switch bezel to the seat cushion assembly and set aside.
Remove the four nuts that attach the seat cushion pan to the seat assembly.
Remove the production aid seat clip from the front outboard stud and discard (if equipped).
Position the seat pan to access the seat module retaining screw and remove the screw.
Disconnect the electrical connectors from the seat module.
Connect the electrical connectors to the new seat module.
Reinstall the seat module retaining screw. Tighten the screw to 3 N.m (26 lb in).
Position the seat pan to the seat assembly and install the four retaining nuts. Tighten the nuts to 25 N.m (18 lb ft).
Reposition the seat switch bezel and install the three retaining screws. Tighten the screws to 3 N.m (26 lb in).
Lower the seat to the normal position.
If the vehicle is equipped with heated seats, perform all steps on the front passenger side seat as well.

PARTS INFORMATION

Part Number	Description	Qty
15206271	Module, Memory Seat (except heated seats)	1 per vehicle
15206270	Module, Heated Seat with memory	2 per vehicle

Parts are currently available from GMSPO.

WARRANTY INFORMATION

For vehicles repaired under warranty, use:

WARRANTY INFORMATION

Labor Op.	Description	Labor Time
N5510	Module, Heated and/or Memory (left side) - Replace	0.5 hr
Add	Module, Heated Seat (right side) - Replace	0.4 hr
Add	Diagnosis Time	0.0-0.3 hr