I know I have read about this here (or the other place) somewhere but did a search and found nothing.

I have noticed, on occasion, the heated seats will go off after just a few minutes/miles of operation.

I have tried and tried to find some correlation between WHEN the seats go off and something the truck is doing but have not been able to find any.

After they go out, you push the button again and they STAY on.

Is this a known problem?

Should I cut back on the Mexican food?

I thought that they had a 15 minute timer for the first 'set' and then would stay on for the second 'set' or button action during a key cycle?

I thought that they had a 15 minute timer for the first 'set' and then would stay on for the second 'set' or button action during a key cycle?

:confused: Really???


Does it say this in the owners manual?

Guess I need to get that thing out and read it one of these days:rolleyes:

no. mine does it once in a while. ill bet theres a fix in software. our ddm (driver door module) and memory seat module and everything else talks together on a class 2 data line. theres a glitch somewhere. i just live with it because i hate the thought of some idiot playing with my truck. what would be real cool would be a software/ firmware upload site at gm so you could download the latest and greatest take the laptop to the truck hook it up and bingo.:ro)

I've noticed mine do it occasionally. Didn't start doing it until I had the memory seat module replaced (it wouldn't hold the memory correctly), now the heated seats turn off every once in a while shortly after being turned on.

We have found the same thing, heaters turn off by them selves. We can duplicate the situation sometimes on the first time both heaters are on. If I turn off the drivers side quickly the passenger side will go off too. Subsequent times without shutting the truck off can't seem to make it happen again. Must be a voltage spike on the serial data line that does it.

I have the EXACT same problem that PA24Pilot explained.

Start the truck, turn my heater on, then my wife turns hers on, I usually get hot first, so I change mine from Level 3 to 1. Sometimes this simple change causes hers to go off. Othertimes, when I turn mine off, hers goes off. I plan on reporting it next time I take the truck in for warranty repair. Only have 6k miles left :(

Occasionally, after a few minutes of operation, I notice I am not getting warm, look down and they aren't on. So the random going off exists for me.


My guess is that it is an electrical pulse problem. (The same reason why when I first turn the fog lights on, the rear view cargo light in the dash flickers.)

You might as well give up. It will never work rt if it dont now. I have had mine seat memory replaced 3 times and they cant fix the seat warmers either, so if you get a truck that does this stuff its just part of the professional grade gm.

There is a reflash for this. My wife's 03 did this and they finally reflashed the control module and all is well. She was having the same problems with the memory seats as well and the reflash fixed it.

OD

There is a bulletin out about this. GM is saying the buttons are inadvertently being pressed. They have made a new low profile switch. Have the dealer reference PI01850.

15116861 passenger

15116862 drivers w/ memory, heated, and adjusted pedals

15116863 drivers w/ memory and heated only

If there are codes set in the driver seat module then there could be a problem in the adjustable pedal position sensor, seat recliner position sensor and both heat seat thermistors. They share the 5volt reference circuit with the seat module and a problem with them could cause the heaters to turn off. Have the dealer reference PIT3287 for this problem.

Go figure, leave it to GM to blame the customer for a problem. I can guarantee that the seats are not going off because of me "hitting" the buttons.

- Andrew

In my 03 it was amazing how often someone would hit the heated seat button. Usually turning them on. On my 04 it never happens. They did a good job of fixing the buttons.

i dont know about anybody elses truck but no-one in my truck is inadvertently hitting the button. when they go off they BOTH go off at the same time. youd have to have some d##m long arms to do that):h

Sounds like it would be the door control module.

Mine is, and has been since day 1, 100% reproducible. I first noticed it when I came out to warm up the truck on cold days. I set both seats to their max setting. Within a couple of minutes both would shut off. If I set both to the mid setting, they will stay on until I shut them off. Almost seems like some type of "circuit breaker" (resettable) problem.

I haven't wanted to do without my truck for a day to take it in to the shop, so I haven't done anything about it, but I'm starting to get close to the end of the warranty, so they will get a chance to diagnose it soon!!!

They have replaced all that on mine several times and they still turn off when they please. I'm not even in the truck sometime when it does it.

prairie goat may have something, both driver and passenger heating elements seem to be fed from a 30 amp ckt. breaker at the IP relay block ,wherever that is. that would definitely turn them off ,but i would think it would take a couple minuetes to cool down and reset if tripped, i can hit my button and turn back on immediately after they go out. im still leaning towards electrical ghosts roaming around on that fancy class 2 data line. ):h

prairie goat may have something, both driver and passenger heating elements seem to be fed from a 30 amp ckt. breaker at the IP relay block ,wherever that is. that would definitely turn them off ,but i would think it would take a couple minuetes to cool down and reset if tripped, i can hit my button and turn back on immediately after they go out. im still leaning towards electrical ghosts roaming around on that fancy class 2 data line. http://www.dieselplace.com/forum/images/smilies/hihi.gif
Yup, you are right peekok...I can turn mine back on immediately after they go out as well. http://www.dieselplace.com/forum/images/smilies/confused.gif