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2004 Suburban - Heated bucket seats-drivers seat not working. Passanger seat works fine. Drivers switch stays on 10 seconds & turns off. If passenger seat is on, it will shut down when drivers seat button is touched


there is a few bulletins out

there is a few bulletins out on heated seats, i've posted a few, let me know if you think they apply to your concern. mws919

Bulletin No.: 04-08-50-007

Date: March 12, 2004

INFORMATION

Subject:
Service Information for Front Heated Seat Inoperative/Cold

Models:
2003-2004 Cadillac Escalade/ESV/EXT
2003-2004 Chevrolet Avalanch/Silverado/Suburban/Tahoe
2003-2004 GMC Denali/Sierra/Yukon/Yukon XL
2003-2004 Hummer H2

The purpose of this bulletin is to provide the technician with the following service information:

^ Heated Seats Switch Operation
^ Heated Seats Switch Diagnostics
^ Heated Seats Switch Customer Information

Switch Operation

1. The engine must be running for the heated seat feature to work. The heated seats will shut off automatically when the ignition is turned off.

2. Two buttons, located on the door, are used to control the heated seat.

^ Press the horizontal (RH) button to heat the entire seat, back and cushion.

^ Press the vertical (LH) button to heat ONLY the seat back.

^ The three light bars are an indicator of the level of heat selected for either the entire seat (horizontal button) or ONLY the seat back (vertical button).

3. To heat both the seat back and seat cushion at the same time, press the horizontal (RH) button with the heated seat symbol one time.

^ All 3 light bars will glow indicating the HIGH temperature setting.

^ The horizontal (RH) button does NOT have an ON/OFF indicator light.

4. Press the button a second time, 2 light bars will glow indicating the MEDIUM temperature setting for the entire seat.

5. Press the button a third time, 1 light bar will glow indicating the LOW temperature setting for the entire seat.

6. Press the button a fourth time to turn the entire heated seat OFF.

7. To heat ONLY the seat back, press the vertical (LH) button one time.

^ An ON/OFF indicator light over the heated seat back symbol will glow to designate that ONLY the seat back is being heated.

^ All 3 light bars over the horizontal (RH) button will glow indicating the HIGH temperature setting for ONLY the seat back.

8. Press the button a second time, 2 light bars will glow indicating the MEDIUM temperature setting for ONLY the seat back.

9. Press the button a third time, 1 light bar will glow indicating the LOW temperature setting for ONLY the seat back.

10. Press the button a fourth time to turn the heated seat back OFF.

Switch Diagnostics

Important: In order to eliminate unnecessary part replacement and comeback repairs, it is essential that the appropriate diagnostic tables and aids found in the applicable manuals are followed.

1. Verify the condition prior to making any repairs. Refer to Seats and Seat Controls in the applicable Owners Manual or this bulletin for proper heated seat switch operation information.

2. If an improperly operating front heated seat condition exists, refer to the Diagnostic Information and Procedures in the Seats sub-section of the applicable Service Manual in order to diagnose the system accurately.

3. When measuring the resistance of the seat heater elements, ensure the values are within the updated range of 1.5-5.5 ohms. Refer to DTC B2425 or B2430-Clearing the DTC in the Diagnostic Information and Procedures in the Seats sub-section of the applicable Service Manual.

Customer Information

Some heated seat components from the above listed vehicles have been returned to the Warranty Parts Center (WPC) for heat function not operating properly. Analyses of these parts show 'no out of specification condition' or No Trouble Found (NTF).

1. Provide customers with the knowledge that if bumped, either one of the heated seat switches can be activated/deactivated accidentally.

2. Ensure customers have a thorough understanding of how the heated seat switches function.

Bulletin No.: 05-08-50-008

Date: August 19, 2005

TECHNICAL

Subject:
Intermittent Heated Seats Inoperative, DTC B3941 Set (Reprogram Driver Seat Module)

Models:
2003-2005 Cadillac Escalade, Escalade ESV, Escalade EXT
2003-2005 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2003-2005 GMC Sierra, Yukon, Yukon XL, Yukon Denali

All with Seat FRT, Individual (Non BKT) (RPO AN3)

2003-2005 HUMMER H2 with Seat, Front Bucket Deluxe (RPO AR9)

Condition

Some customers may comment that occasionally the seat heater will not operate when activated. If the ignition key is cycled OFF and back ON again, the heated seat will operate correctly. Also, on some LB7 diesel engine vehicles, the seat heater may turn itself off during the first 10 minutes of operation. This occurs only with the first activation for the day and works correctly with subsequent activations immediately after the event. These conditions are intermiffent and DTC B3941 may be set.

Correction

Technicians are to reprogram the driver seat module with an updated software calibration. This new service calibration was released with TIS satellite data update version 6.5 available June 13, 2005. As always, make sure your Tech 2(R) is updated with the latest software version.

Warranty Information


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