If you have dual controls in your truck then you need to replace the blend door motor on the drivers side. Most likely the problem. The only other problem would be faulty wiring or bad control unit. Usually the blend door. It has 2 on the vehicle so be sure to get the right one.
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Hello and welcome. this almost always a bad seat heater element in the seat. the first thing that will need to be done, is have the seat control module scanned for trouble codes. also will need to check the seat heater elements resistances.
After putting more fuel in the vehicle
Open the hood
On the righthand side of the engine just to the side of valve cover, back by the firewall you will find a round plunger about 1 1/2" in diameter. The plunger will push down and come right back up on its own. Push the plunger rapidly till the pushing gets firmer or stiff.
Start it up. Sometimes it will have to be done a couple of times. I actually fined it works best to pump it firm and then have someone else start it while you keep pumping it. If you do it this way make sure your body is clear of all moving parts.
This is a very fast way of getting it going
door window does it work from driver door yes or no then does not work at that door , if it does not work from that same door its the switch in door, Second take it to a auto body shop its cheaper rates
I have a 2003 chevy 2500HD extended cab that the right side window, seat heater, seat controls, door lock, will not work. all other windows and door locks work. I checked all fuses and they are good. what can it be.