Defective Right Air Temp Door

sputnik40 · 03-22-2008, 03:26 PM

2004 GMC Duramax 2500 Sierra. Has seperate driver/passenger (his/hers ;-) air temp adjustment - manual slide lever. Right side blows hot 100% of the time. Dealer says "defective air temp door" which I guess means the switch is ok. Dealer says part is $220 and another $530 to install - dash has to come out.

Anyone have any similar experiences? I've wrenched on older cars, weld, rebuild engines, tranny's, t-cases, etc. but never touch the new vehicles.

Also - I've had consistent problems for 4 years in that I've always suspected that the fresh/cab air switch wasn't working right - sometimes it won't cool in the Summer when temps are higher than 90 deg - and the ac checks out?

DragonSlayer · 03-22-2008, 04:18 PM

I have the auto-digital temp control in my truck. It blows great sometimes, then the driver side will go hot. I swapped the control from my buddies truck(flipped) and it does the same thing.

I think the door motor is jacked up.

sputnik40 · 03-22-2008, 07:24 PM

Quote:

Originally Posted by DragonSlayer

I have the auto-digital temp control in my truck. It blows great sometimes, then the driver side will go hot. I swapped the control from my buddies truck(flipped) and it does the same thing.

I think the door motor is jacked up.

Do the night time background lights in your switches work? When it first started going - the passenger side light went out. I could wiggle it up and down and it would affect the driver side light - going to pull them out tomorrow and have a look see?