Question about 2004 Chevrolet Silverado 2500HD

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2004 Chevrolet Silverado 2500 HD heated seats

How do you disconnect the heated driver seat- it comes on automatically while I am driving -- heating me to death!!!!!

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  • JLMorley Nov 02, 2008

    There are so many wires under the seat, not sure which one to disconnect. Thanks for trying though. The seats automatically heat up when I turn the switch on in the truck. We unhook the switch from the side door panel, but they still heat up. Anyone else have a suggestion, or can tell us what color wire to be looking for? Thanks so much

  • Anonymous Dec 27, 2008

    A chevy dealership told me that it is either the module or the actual switch in the door. 75% of the time, its the switch and can be fixed for $250. But if its the module your looking at $500 !

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Pull the fuse for seat heater inside dash pael on drivers side

Posted on Jun 20, 2010

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I cant give you a precise location, but it will be underneath the seat, probably to one side. It should have a connector that can be disconnected.

Posted on Oct 22, 2008

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1 Answer

My 2004 Chevrolet 3/4 ton truck heated seats come on without turning on the switch. Is there a fuse or a wire I can disconnect? It is 108 degrees here in Austin, TX. I don't need heated seats. Thanks


THEIR SHOULD BE A MODULE UNDER THE SEAT TO UNPLUG .THEIR HAS BEEN PLENTY OF PROBLEMS WITH THIS HEATING ISSUES SOME WORK SOME DONT .MAYBE TAKE THE DOOR PANEL OFF AND UNPLUG THE SWITCH FROM THE BACK SIDE

Aug 05, 2011 | 2004 Chevrolet Silverado 2500HD

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My heated seats in my 2003 chevy silverado 2500 hd turn on to high automatically when i start the truck. how do i fix this or atleast unhook them untill winter?


well you can't just pull the plug or unhook the seat from below,, the motor for adjusting the seat seems to be on the same circuit, unless your the only one who drives the vehicle, then you could yank the circuit breaker for the seats , what it sounds like to me with the heat issue is that you have a shorted element in the seat itself, and they are pretty lame as heaters go, Chevy sells a replacement which consists of a piece of tape with the element inside of it, and you have to remove the covers and weave this replacement through the seat,, Ive only done one, but you could see all the burn spots on it,

Jul 08, 2011 | 2003 Chevrolet Silverado 2500HD

1 Answer

My drivers side heated seat will not stay on. It wil come one on breifly and kick off.


Chances are the heated seat elements in your seat are open.You will need new elements in that seat installed.Gm makes just the elements.All you will need to due is remove the fabric.

Dec 06, 2010 | 2004 Chevrolet Silverado 2500HD

2 Answers

I have a 2004 Chevy Silverado. The heated seat on the drivers side does not work. When you push the button to turn it on, the lights come on briefly then turn off.


Would you say it stays on about 30 seconds and does the passenger side do the same thing? If possible retrieving the codes will narrow down the search for a correct solution.If the passenger side is ok we may be able to eliminate the passenger side as bring part of the problem.Please advise so will know which way to go with your solution.


Condition/Concern:
Driver and passenger heated seats inoperative or shut off in 30 seconds. There will be DTCs B2435, B2440, B3606 and/or B1825 set in the Drivers Seat Module. The adjustable pedal position sensor, seat recliner position sensor and both heat seat thermistors share the same 5 volt reference internal to the Drivers Seat Module. A fault in any of these components/circuits can make the heated seats inoperative or shut off in 30 seconds, as well as, the seat recliner and/or adjustment pedals may move in short increments when operated. A fault in heated seats, adjustable pedal or seat recliner will affect BOTH heated seats.
Note:: Even if the vehicle is not equipped with adjustable pedals DTC B3606 still may set.


To help isolate the area of concern use the Tech 2 or a comparable scanner and go to "Sensor Data" in the Drivers Seat Module. Monitor the following parameters for being out of range:
Recline Position- Normal range .39V-4.58V
Pedal Position (if equipped) - Normal range .39V-4.58V
Psgr. Seat Heat Sensor- Normal range 1V-4V
Drvr. Seat Heat Sensor- Normal range 1V-4V
If a parameter is found to be out of range inspect circuits for any opens, shorts to ground, or voltage. If none found replace the suspect component.

Please be aware of the following common areas of concern:
  1. The adjustable pedal position sensor internally shorted pulling the 5 volt reference low. Disconnect the adjustable pedal position sensor and see if the heated seats start working correctly, if so replace. Note Important:: The APP (Accelerator Pedal Position) sensor is NOT the adjustable pedal position sensor. Make sure the correct sensor, adjustable pedal position sensor, is disconnected.
  2. The seat recliner position sensor internally shorted pulling the 5 volt reference low. Disconnect the recliner position sensor and see if heated seats start working correctly, if so replace.
  3. An open in either heated seat thermistor circuits (signal or low reference). The most common is the passenger thermistor where it passes through seat connector C305 pin "L" or "K" or C399 pins "R" or "G".
  4. A chaff to ground on either heated seat thermistor signal circuits. The most common is circuit 5475 black/red or dark blue shorted to ground in the passenger seat near the buckle. Note Important:: The heated seat thermistors act differently to "OPENS and SHORTS" than the adjustable pedal position sensor and seat recliner position sensor. The adjustable pedals and seat recliner sensors can be disconnected for testing of the heated seats. Where as the heated seat thermistor circuit must be working correctly before EITHER heated seat will operate. Disconnecting one thermistor, which may have a concern will not allow the opposite heated seat to work correctly, BOTH side must be operational before EITHER heated seat will operate.
Clearing DTCs
If DTCs will not clear when using the Tech 2 or comaparable scanner after a repair has been made, try operating the device in which the repair was made. Example, if a repair was made to the passenger heated seat thermistor circuit, the DTCs may not clear unless the passenger heated seat is operated.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

Nov 17, 2010 | 2004 Chevrolet Silverado 2500HD

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Driver seat heated seat does not work. It is on for 3 sec and then trips out or shuts off. The passenger seat is fine. Any idea of what causes this and how can I fix it?


I have the same problem with my 03 2500 sierra hd driver seat. lights up for a split second but shuts off. Passenger seat heats fine. Any fix yet?

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2 Answers

2004 chevy. Heated seats will not stay on.


See GM TSB 05-08-143-001, If you have Adjustable pedals, especially if they dont; work with the memeory buttons, but function with thier own buttons. Its the Brake Pedal Position Sensor is shorted and mesing up the seat module which controls the heaters too. My 05 Suburban had the same issue.

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