Yukon Denali AWD V8-6.2L (2007)
Seat Heater Control Module: Customer Interest
Seats - Driver/Passenger Heated Seats Inop./Slow to Warm
TECHNICAL
Bulletin No.: 10-08-50-008B
Date: January 13, 2011
Subject: Driver or Passenger Heated Seat Inoperative, Slow to Warm, DTC(s) Set (Repair Connector, Re-Route Harness)
Models:
2007-2010 Cadillac Escalade, Escalade ESV, Escalade EXT
2007-2010 Chevrolet Silverado, Suburban, Tahoe
2011 Chevrolet Silverado Heavy Duty
2007-2010 GMC Sierra, Yukon, Yukon XL, Yukon Denali, Yukon Denali XL
2011 GMC Sierra Heavy Duty
All Equipped with Heated Front Seat (RPO AN3, KA1) or Heated and Cooled Seat (RPO KB6) and/or Luxury Package (RPO PCK)
Supercede:
This bulletin is being revised to update the RPOs. Please discard Corporate Bulletin Number 10-08-50-008A (Section 08 - Body and Accessories).
Condition
Some customers may comment that the driver or passenger heated seat system exhibits the following symptoms:
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Heated seat turns on and then turns off within 1 to 10 minutes (at any 60 second interval).
-
The system doesn't get warm enough, or gets warm very slowly.
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The heated seat system is completely inoperative.
Upon further review, DTCs B2430 0D and/or B2180 0D may be set as a current or history code if the vehicle is equipped with heated seats only (RPO
KA1). Also, the LED indicator for the heated seats may come On and then flash after approximately 1 minute, then go out.
If the vehicle is equipped with heated and cooled seats (KB6), the switch LED indicator may stay On, but the heated and cooled seat is inoperative. The
fan will continue to blow air.
Cause
Heated Seats (RPO AN3, KA1)
The heated seat control circuit terminal and/or ground terminal in harness connector X1 to the memory seat module (MSM) may have lost tension and is
loose. The reduced terminal tension increases resistance in the connector, which may result in the symptoms described above.
Heated and Cooled Seats (RPO KB6)
The thermo-electric device (TED) in the seat cushion/seat back ventilation heating and cooling module may have become inoperative.
Correction
Heated Seats (RPO AN3, KA1)
Follow the steps below to correct the concern with the heated seats.
Note
This repair requires a unique anti-abrasion electrical tape and harness clip from Kent Automotive. Refer to the Parts Information below.
1. Access and remove the seat bolts/nuts.
2. Adjust the seat rearward about halfway. Adjust the seat recline full forward.
3. Tilt the seat backward to access the bottom of the seat. Prop the seat up with a suitable tool if required.
