TSB - Seat Heater and/or Memory Power Seat Inoperative

[Klaus]

Document ID # 1227631
2003 HUMMER H2

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Seat Heater and/or Memory Power Seat Inoperative (Replace Memory Seat Control Module) #03-08-50-003 - (01/21/2003)
Seat Heater and/or Memory Power Seat Inoperative (Replace Memory Seat Control Module)
2003 Cadillac Escalade, Escalade ESV, Escalade EXT

2003 Chevrolet Avalanche, Silverado, Suburban, Tahoe

2003 GMC Sierra, Yukon, Yukon XL, Yukon Denali, Yukon Denali XL

2003 HUMMER H2

Condition
Some customers may comment that the seat heater and/or memory seat functions are inoperative.

Cause
A logic lockup of the memory seat control module may cause this condition.

Correction

Important
This repair is not to be performed on vehicles without memory/heated seats. If the vehicle does not have memory/heated seats but has an inoperative power seat, use published Service Information to diagnose the concern.


If the seat is currently inoperable, perform the following diagnostic steps to determine if replacement of the memory seat control module is the correct repair:

Connect a Tech 2® to the vehicle and monitor the parameters in the sensor data list for the driver seat module as you try to move the seat. Are the displayed data parameters changing, or does the Tech 2® display no communication as the seat switch is moved to various positions? If the data parameters do not change, the memory seat control module may be inoperative due to a logic lockup.
Remove the SEAT circuit breaker in the instrument panel relay block located under the left side of the instrument panel next to the parking brake. This circuit breaker also supplies power to the passenger seat.
Verify that the circuit breaker is not open. If it is not open, wait 30 seconds and then reinstall the circuit breaker.
Try to move the seat again.
If the seat moves or the data parameters displayed on the Tech 2® change when the seat switch is activated, replace the memory seat control module. Use the Memory Seat Control Module Replacement procedure in SI.
If the memory seat is still inoperative, use normal Service Manual diagnostics to determine the cause of this condition.
Parts Information
Part Number
Description
Qty

15196666
Module, Memory Seat

(HUMMER H2, Cloth Seat, RPO 50D)
1

15196667
Module, Memory Seat

(HUMMER H2, Leather Seat, RPO 502)
1

15196668
Module, Memory Seat

(Full Size Pickups, with AN3, w/o JF4)
1

15196669
Module, Memory Seat

(Full Size Utilities, with AN3 and JF4)
1


Parts are currently available from GMSPO.

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

N5510
Module, Memory Seat System Components-Replace
0.4 hr

Add
Diagnosis Time
0.0-0.3 hr

N5510
Module, Memory Seat System Components-Replace (HUMMER H2 Only)
ST




GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

© Copyright General Motors Corporation. All Rights Reserved.


--------------------------------------------------------------------------------
Document ID # 1227631
2003 HUMMER H2

[Klaus]

Document ID # 1227631
2003 HUMMER H2

--------------------------------------------------------------------------------

Seat Heater and/or Memory Power Seat Inoperative (Replace Memory Seat Control Module) #03-08-50-003 - (01/21/2003)
Seat Heater and/or Memory Power Seat Inoperative (Replace Memory Seat Control Module)
2003 Cadillac Escalade, Escalade ESV, Escalade EXT

2003 Chevrolet Avalanche, Silverado, Suburban, Tahoe

2003 GMC Sierra, Yukon, Yukon XL, Yukon Denali, Yukon Denali XL

2003 HUMMER H2

Condition
Some customers may comment that the seat heater and/or memory seat functions are inoperative.

Cause
A logic lockup of the memory seat control module may cause this condition.

Correction

Important
This repair is not to be performed on vehicles without memory/heated seats. If the vehicle does not have memory/heated seats but has an inoperative power seat, use published Service Information to diagnose the concern.


If the seat is currently inoperable, perform the following diagnostic steps to determine if replacement of the memory seat control module is the correct repair:

Connect a Tech 2® to the vehicle and monitor the parameters in the sensor data list for the driver seat module as you try to move the seat. Are the displayed data parameters changing, or does the Tech 2® display no communication as the seat switch is moved to various positions? If the data parameters do not change, the memory seat control module may be inoperative due to a logic lockup.
Remove the SEAT circuit breaker in the instrument panel relay block located under the left side of the instrument panel next to the parking brake. This circuit breaker also supplies power to the passenger seat.
Verify that the circuit breaker is not open. If it is not open, wait 30 seconds and then reinstall the circuit breaker.
Try to move the seat again.
If the seat moves or the data parameters displayed on the Tech 2® change when the seat switch is activated, replace the memory seat control module. Use the Memory Seat Control Module Replacement procedure in SI.
If the memory seat is still inoperative, use normal Service Manual diagnostics to determine the cause of this condition.
Parts Information
Part Number
Description
Qty

15196666
Module, Memory Seat

(HUMMER H2, Cloth Seat, RPO 50D)
1

15196667
Module, Memory Seat

(HUMMER H2, Leather Seat, RPO 502)
1

15196668
Module, Memory Seat

(Full Size Pickups, with AN3, w/o JF4)
1

15196669
Module, Memory Seat

(Full Size Utilities, with AN3 and JF4)
1


Parts are currently available from GMSPO.

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

N5510
Module, Memory Seat System Components-Replace
0.4 hr

Add
Diagnosis Time
0.0-0.3 hr

N5510
Module, Memory Seat System Components-Replace (HUMMER H2 Only)
ST




GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

© Copyright General Motors Corporation. All Rights Reserved.


--------------------------------------------------------------------------------
Document ID # 1227631
2003 HUMMER H2