OK--Thats cool--what part number and procedure to replace the electric coil? BTW- I checked the fuses and all connections under the seat. The car has 96,000 miles on it and te rest of the seats all heat fine.
Please reply with the above requested information. Thanks and you should have $13 from my paypal account.
This bulletin is being revised to update the model year information. Please discard Corporate Bulletin Number 01-08-50-001B (Section 08-Body and Accessories)
Some customers may comment that the front/rear seat assembly heat function is not operating properly. The front/rear seat back and seat cushion remain cold when either the HEAT/OFF switch or the BACK ONLY switch is activated.
This condition may be due to a non-functioning heat element in the front/rear heated seat back/cushion trim cover.
The heated seat system consists of four heated seats, two in the front and two in the rear. On the DHS and DTS models, each heated seat consists of four heat elements, one in the seat back and three in the seat cushion. On the DeVille model, each heated seat consists of two heat elements, one in the seat back and one in the seat cushion.
Front Seat Back Cushion Heat Element
Front Seat Cushion Heat Element
Front Seat Cushion (LH Thigh) Heat Element
Front Seat Cushion (RH Thigh) Heat Element
Rear Seat Back Cushion Heat Element
Rear Seat Cushion Heat Element
Rear Seat Cushion (LH Thigh) Heat Element
Rear Seat Cushion (RH Thigh) Heat Element
RH Rear Seat Back Cushion Heat Element
LH Rear Seat Back Cushion Heat Element
LH Rear Seat Cushion Heat Element
RH Rear Seat Cushion Heat Element
Important: If the resistance is measured with the seat still warm, the resistance may vary outside of the specified range since the thermistor resistance varies with temperature.
If a sublet trim repair facility is used, please provide a copy of this bulletin to the repair shop.
Important: Before installing the service heat element to the seat trim cover, verify that the resistance values are within the correct range. Refer to the following table.
Less than 10 ohms
Seat Back Elements
Seat Cushion Elements
DHS & DTS
With Seat Cushion, LH & RH Thigh Elements Connected
Less than 30 ohms
Seat Cushion Thigh Elements
Important: DO NOT attempt to remove the factory heat elements from the seat trim cover. The service heat element is to be installed between the factory heat element and the seat trim cover.
Important: DO NOT start the cut with a jab or poke.
Important: DO NOT cut through seams.
Tighten Tighten the fasteners to 9 N·m (80 lb in).
F/Seat Back Cushion Heater
F/Seat Cushion Heater
F/Seat Cushion (LH Thigh) Heater
F/Seat Cushion (RH Thigh) Heater
R/Seat Back Cushion Heater
R/Seat Cushion Heater
R/Seat Cushion (LH Thigh) Heater
R/Seat Cushion (RH Thigh) Heater
Parts are currently available from GMSPO.