Question about 1992 GMC Suburban

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1992 GMC suburban front air don't blow

My front air just stopped blowing .I can hear it go on but no air comes out.My rear air blows fine .

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REMOVE THE BLOWER MOTOR CHECK IT.HOOK IT TO BATTERY TO SEE HOW WELL IT WORKS. IF IT RUN SLOW OR RUN STOP RUN.REPLACE IT.IF IT CHECKS OUT OKAY.THE PROBLEM. COULD BE THE AC+ HEAT- CONTROL MODE SWITCH.

Posted on Aug 02, 2009

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GMC Yukon AC and Heat Questions - Car Forums at Edmunds.com

forums.edmunds.com > Chevrolet > Chevrolet Suburban

Jul 20, 2010 - 30 posts - ‎16 authors
I just don't get why that doesn't work right in the first place. ... I have 99 Yukon that has a problem with the front air. .... $55,000 for my GMC, I guess expecting cold air when we push A/C and getting 90 degree blast ... 2001 Yukon XL 1500 Front heat & air fine, rear ac blows hot as if heater is on in all settings. More results from forums.edmunds.com

Nov 18, 2015 | GMC Cars & Trucks

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My climate control only blows out cold air but the rear climate control works as it should


Could be the controller or a faulty blend door.
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Sep 28, 2012 | 1999 GMC Suburban

1 Answer

1997 gmc rear air conditioner is blowing hot


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Jul 04, 2012 | 1998 GMC Suburban

1 Answer

Why does my 1990 suburban keep randomly blowing the ecm b fuse has gone months with out a problem then is drivible again then will blow fuses again. Seems to come and go on its own


Scroll up and LISTEN to the guy talking about a SHORT. That's what it is. Take off the air cleaner assembly. Lift all the wires up and off the engine, pull the big wire loom a half inch out of the hole it disappears in going through the firewall. Keep doing this until the fuse stops blowing. Took me ten seconds. I still don;t know which wire it is, but I am buying some rubber fuel line and/or wiring loom protector to insulate everything off the valve covers, etc. Be sure to pick up extra 15 amp fuses in case it happens again, and be ready to tell anyone who drives the thing what to do.

Case: 1990 GMC 1500 SLE Suburban. Ran just fine, then the ignition shut off when I hit a random bump or pothole. Cost me a $750 tow before I got on here and did the wiggle test. The fuse stopped blowing. I will update if my fuel line/insulation idea didn't work, but I think it will. I will also tape every exposed wire with electricians tape. . .

Jul 04, 2010 | 1990 GMC Suburban

1 Answer

The rear a/c on my 1996 gmc suburban is blowing hot air, the front blows cold. where is the heater control valve for the rear heater core? i have taken the panels off of the condenser and the ducts for the...


the problem is in the rear expansion valve. this valve is located at the rear evaporator core. i am assuming the freon level has been checked and is ok. this is a common problem with these vehicles. hope this helps!!

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Did you hear a little rythmic squeaking noise under the dash by the driver's right knee? Is the noise now gone? There is a little oscillating air flow gate there that often goes bad...I can't remember the name of the part, for the life of me, but the dealer has them.

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1 Answer

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the resister block needs changing... oddly enough i'm unsure of what fan you are saying is not working.... if it's the front.. the resister block is located on the duct work under the dash for the air... near the fan... you will see a connector going into the side of the duct work. two screws and the block comes out... should be fairly obvious for the rear one but it will be near the fan.

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check you antifreeze level and make sure its full

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Front air not blowing


Check the switch, maybe the switch problem

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