Both front seat heaters quit working?

Hello,

It sounds like the DDM has gone out which is common but we should check the fuses first here is a guide to help us get started with the locations of the DDM fuses and the drivers door module. Also I have included the wiring diagrams so you can see how the system works.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.

Tested ok and it does have the memory style seats. The indicator lights do not come on at all when the button is pushed.

Okay, seems this is a common problem with the newer Tahoes. There is actually a TSB (techincal service bulletin) about this issue. Most likely the driver door module will need reprogrammed, however, you need to have the driver door module scanned by Chevrolet dealer to see if it has to be completely replaced or if it just needs reprogrammed.

I found the DDM was bad it cost me $340.00 to get it fixed FYI

The driver's side seat heater stopped working. You press the button and it will shut off after about 2 seconds. The passenger side seat heater works perfectly unless the driver's side button is pressed. What do I do to fix this? I don't know what's wrong.

check with gm on this 1.they have a problem with the heated seats on all there divisions.they have to have a service bullitin out

2003 Chevy Tahoe, 42k 5.3L

The heated seat on the driver side recently quit working. When the buttons are pressed on the door, the lights come on momentarily then there's a click from a black box under the seat and it shuts off. I also noticed that the passenger seat works, til you press the driver side and everything shuts off. Does have something to do with the 'black box' under the driver's seat. What is the box called? Is this common? Any and all info would be greatly appreciated!

Thanks!

-Opie

Electrical problem
2003 Chevy Tahoe V8 Four Wheel Drive Automatic 70000 miles
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The Lock, window, and heated seat won't work on the front passenger side only. Could it be a fuse issue? If so, I looked for the fuse and could not find it. Thanks

I have the exact same problem with a 2003 chevy silverado LT I have not been able figure any thing out. I have checked all fuses and everything looks good. If you find out any thing please let me know.
[email protected]

remove the window switch on the passenger side and disconnect it for 30 sec. if everything starts working, that unit (passenger side door module) will need to be replaced. if not it will need to be reprogramed

I have a 1999 Tahoe with 98,000 KM on the clock. The drivers side seat heater no longer functions in either med or high. The passenger side still works, the fuses and the switch check out OK. The seatbelt warning still works as do all the power movement switches. Does anyone know how the safety cutoff works? Is it a "squat" switch that detects weight in the seat or off the seatbelt warning. In 1999 the switch for the seat heat is on the lower outboard side of the seat, not in the door as with newer models. Any ideas?? .....Canamatt

I have the same problem with mine. Last year at about 75,000 my driver side heated seat stopped working, all other power seat and lumbar swithches work perfect. My passenger side heater works fine too. Ive checked the fuses and they all seem fine. Ive read where this has been a problem in other Tahoe's. Any suggestions or fixes?
please respond to [email protected]

Electrical problem
2000 Chevy Tahoe V8 Four Wheel Drive Automatic 105000 miles

My heated seat has failed. Before completely failing it did seem to get very hot when used (even on low) and then just quit working.

11/05/08
I was hoping that you could provide some repair information in your reply, such as: can it be repaired and how difficult or does the seat need to be replaced? If it needs to be repaired in shop, what an estimate might be?

Again, thanks for the help and thanks in advance for any additional information you may be able to provide.

The heating elements usually burn apart and cause them to quit working.

Remove the seat from the vehicle. Remove the seat covers. You will find the heating elements attached to the cushion or the cover. Leave them there. Cut the wires from the heating elements. Attach the new elements to the old ones and connect the wires. Re-install the covers and the seat.

Interior problem
2003 Chevy Tahoe V8 Four Wheel Drive Automatic 98542 miles

Driver heated seat wont work,push buttom light comes on for a while then goes out. Passenger seat fine.

If the switch light comes on then goes off after some time, chances are the switch itself is bad and can't handle the electrical draw. Have that checked to confirm.

Let me know what you find.
Joe

Electrical problem
1999 Chevy Tahoe V8 Four Wheel Drive Automatic

my driver side heated seat is not working i have power going to it

Hello chevy1999tahoe If there is power to the module but it still not working , the module need to be replaced

I'm sending the wiring diagram to your email.

why can i find the module in the car

Hello chevy1999tahoe


Try unplugging the connector use a volt meter on it, if there is voltage at the connector, the heating element is No good.

How I know if the module is working and what should the heated element read when I check them

Hello chevy1999tahoe

Lets start from the beginning.
My understanding of the first post was that the driver side heated seat is not working and you have power going to it.
What happens when you push on the button (switch) for the driver heated seat?
The driver and passenger side heated elements share the fuse 20A in the fuse box. If only the driver side is not working, then the fuse is o.k. you can try to unplug the connector to the heated element under the driver seat and while activating it (pushing on the button) check with test light if there is power at the connector.
If there is no power, the problem is with the switch or the wire from the switch to the connector is broken.
If there is power, the heated element is defective and will need to be replaced.

I have a 2003 Tahoe and both heated seats are not working. When you press the heated seat button, the lights come on but when you let go of the button, the lights go out. This is for both sides, driver and passenger this is occuring. Any idea what the problem maybe? Please email me at [email protected]

i have power to the switch i have 0.9 ohms at the purple and black wire

Disconnect the body harness to seat harness connectors at the rear of the front seats. Check for heat damage, or otherwise a poor connection. At this point a wiring repair will be needed, with new terminals and connector body. If you find nothing at the seat to body connectors, and it has drivers memory seat, check the connections at the memory seat module.

Hello chevy1999tahoe _
good job

Remove the connector to the switch with engine off, check continuity on the switch(where the black and purple wire connect)
if you get infinite resistance, replace the switch.

Yes it has memory seats also. Where is the memory seat module located? As I mention, you can press drivers side and the passenger side heat buttons, and they will light up, but as soon as you release the button, the lights go out. Would a bad relay cause this also? I don't believe it would be a fuse because the lights wouldnt come on at all if it was a blown fuse, correct?

i put the driver side switch in the pass side and it work on the pass side

The fact that it is experiencing concern with both seats, I would suspect a connection issue at either the driver/passenger seat to body harness connector, or the seat module. There is no relay, nor an independent seat heater module. Both seats share a common power, and a common ground through the memory seat module. The way the system works, is the heated seat switches are wired to the respective door modules, and the door modules send bus messages to the seat module for operation. Open/high resistance elements, could cause this concern. but you would have to have at least one on each seat.

Hello _

Tell me everything you have done then I will know what need to be done.

i replace the switch from driver to pass and the switch the module and check for power and i have power check the resistance on the purple wire and black wire and i got 0.9 ohms i read online that if 1 element is out they both do not work

I have a 98 Chevy Tahoe my heated seats do not work. I have checked all fuses and checked all wire harnesses, do you have any other suggestions of what else it might be.

I have a 98 Chevy Tahoe my heated seats dont work. I have checked all fuses and wire harnesses, do you have any suggestions of what it might be?

i swap the switch amd module and the pass still works i check for power i have power i check the heater element on the back of the seat the purple and black wire resistance is 0.9 with it unplugged

you need a new heater element on the driver side.if there is power to the element but it does not work.
Replacing the element will solve the problem.

I have 2 heated element so I have to replace both of them

Yes, replace them and that should take care of the problem

heated and power seat on driver side, dont work.

Check the circuit breaker...