OT Help me with suburban - The 1947 - Present Chevrolet & GMC Truck Message Board Network

houston69 · 12-09-2002, 11:42 PM

sorry to be off topic .. but i have to get a fix quick. On my 99 suburban, the ac controls won't change air flow from the defrost, no matter what I do. It is stuck blowing through the defrost vents, what gives? Is this a common problem with that year suburban? Any help is appreciated! thanks in advance

K5KRAZIE · 12-10-2002, 03:07 AM

Is it auto climate control?
I would check all the fuses first. If all the fuses are ok then I would make sure the bleand motors were getting power. You will need the service manual to diag. this problem, if a fuse doesn't fix it.

jhow66 · 12-10-2002, 03:50 PM

Sounds like a vacumn problem--check main vacumn feed to heater controls.

12-09-2002, 11:42 PM	#1
houston69 Registered User Join Date: Nov 2001 Location: houston,tx,usa Posts: 81	OT Help me with suburban sorry to be off topic .. but i have to get a fix quick. On my 99 suburban, the ac controls won't change air flow from the defrost, no matter what I do. It is stuck blowing through the defrost vents, what gives? Is this a common problem with that year suburban? Any help is appreciated! thanks in advance

12-10-2002, 03:07 AM	#2
K5KRAZIE Registered User Join Date: Oct 2002 Location: Wa. State Posts: 352	Is it auto climate control? I would check all the fuses first. If all the fuses are ok then I would make sure the bleand motors were getting power. You will need the service manual to diag. this problem, if a fuse doesn't fix it. __________________ TRUCKS '72 K5 '06 mega dually

12-10-2002, 03:50 PM	#3
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Sounds like a vacumn problem--check main vacumn feed to heater controls. __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer



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