Question about 1997 GMC Suburban

1 Answer

Have 97 gmc suburban. Heat blows out vents an floor when I switch to defrost it jus stays on vents. Passanger side will defrost verry slow. Half of driver side will not defrost. What could b issue?

Posted by on

  • 3 more comments 
  • Aaron Honeycutt
    Aaron Honeycutt Jan 02, 2017

    I have removed dash b4 an the arm for opening defrost had fallen off bur I put it back on and it has worked fine. Lil over a week ago I removed radio to replace antenna adaptor an the clips to hold ac panel in place r broken so it moves around a bit when remove front dash peace. Since then the lights have stopped working on control panel an I jus realized today defrost no longer works. I checked the plugs on control panel today an there plugged in still. Could it b a short or something? If so can it b bypassed? I'm a single father don't have 160 for new pannel

  • Aaron Honeycutt
    Aaron Honeycutt Jan 02, 2017

    Btw I'm pretty sure it's electronic but I'm not 100% sure. I'm no mechanic. Due to the amount of unplugging in tha 2 days it took to remove dash an put back on I'd say it is.

  • eric allen
    eric allen Jan 02, 2017

    youtube search this....
    How To Install Replace AC Heater Control Panel 1995-99 Chevy Tahoe it's the same as the one you have.

  • Aaron Honeycutt
    Aaron Honeycutt Jan 02, 2017

    Thanks for tha answer bro. Maybe u can help with another question. After alot of Google searching I found out that the motor beside tha gas peddle tha works makes it switch blowing positions can b accessed without dash removel. The arm tha connects to tha defrost door had fallen off again. How do u make it stay on. It has a rotating cap that slides over a stud coming out of tha vent box so when the arm moves tha stud rotates opening the vent. There's no keeper and I can't glue it because it spins. Or can I glue it? Not sure. Tha whole peace spins but if I glue tha stud and slide on tha arm will it still work right or dose it spin inside cap also. If any of that makes since to u.

  • David Ellis Rhea Jan 02, 2017

    The only way I could fix it would be to be there and make a try. I use all kinds of stuff for that problem,, including "epoxy cement for plastics", and all kinds of pieces of metal, plastic and wood as needed.

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • GMC Master
  • 2,344 Answers

Dear Aaron,
Your heater and air conditioner assemblies are partly vacuum actuated.
The parts underneath the dash are also largely plastic.
Many, if not most of the time, either there is a vacuum leak ( that you
probably cannot hear) or a plastic part that is sticking or has broken. Those parts like that are usually inside the housing & ductwork under the dashboard on the right side also under the glove box.
God bless your efforts.

Posted on Jan 02, 2017

  • Aaron Honeycutt
    Aaron Honeycutt Jan 02, 2017

    Thanks for tha answer bro. Maybe u can help with another question. After alot of Google searching I found out that the motor beside tha gas peddle tha works makes it switch blowing positions can b accessed without dash removel. The arm tha connects to tha defrost door had fallen off again. How do u make it stay on. It has a rotating cap that slides over a stud coming out of tha vent box so when the arm moves tha stud rotates opening the vent. There's no keeper and I can't glue it because it spins. Or can I glue it? Not sure. Tha whole peace spins but if I glue tha stud and slide on tha arm will it still work right or dose it spin inside cap also. If any of that makes since to u. I'd send a pic but I'm new to this an have no idea how to add a pic

×

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad
  • 2 Answers

SOURCE: I have a 97 SIERRA. HEAT WORKS FINE ON DRIVERS

If you have climate controls that are "slide type" knobs...likely that the cable that controls the diverter panel in the blower box is broken....

Posted on Feb 27, 2009

  • 13 Answers

SOURCE: 97 Sierra no heat on passanger defrost or floor

I assume you have the dual climate control feature on your truck. it sounds like you have door problems. The heating system has several doors inside the box and duct work that divert the air from defrost to face and feet...i'm not 100% sure if the ones in your truck are electronic or vaccum, but i think they are electronic. From time to time the actuators that control the door go out, as every electric motor does. You need to find the ones that have quit and replace them. It is possible that the arm(s) on the actuator(s) have broken loose from the doors and are working but not pushing or pulling the doors properly...if might help to remove the front seats...just to help save your back....working under the dash is hard on your body....and it take a good half day to remove the dash, so working under it is actually less work.

Posted on Mar 13, 2009

alicantecoli
  • 22156 Answers

SOURCE: a/c and heater only blow air out of defrost

either a vacumn pipe is broken or the ends split so its not passing a vacumn to open the flaps,where they are and how to get to them i cant help because i have never worked on one as they are not here in spain.check the engine end first though .Look for some small rubber pipes running from the inlet manifold

Posted on May 30, 2009

  • 1311 Answers

SOURCE: On my 2004 Gmc Envoy, Heat only comes out on

Sounds like the driver's side temperature actuator or blend door are defective. Part of the dash needs to be removed to access these parts.

Posted on Nov 03, 2011

lderr2040
  • 40 Answers

SOURCE: my a/c will only blow out the defrost in a 97 gmc jimmy

It is either the servo door could be blocked by something like a pencil falling through or something falling and blocking it from opening. Or it is actually broken. I have seen them both ways. Mine was actually broken in my Ford F250. You should still take it in to someone who can deal with it for you.

Posted on Apr 09, 2012

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Have a 1996 buick park avenue heater works only on half the car passanger side has heat driver side cool air the defrost to vent to floor doesent work check for vacume to heater switch no vacume at all...


you can have relay fan faulty, blower, or heating elements or duct NOT o.k .However you can go to www. aa1car.com get the topic and fix it.
God bless you

Nov 20, 2013 | 1998 Oldsmobile Intrigue

1 Answer

My heat wont blow out my vents just my defrost vents and it wont switch from ac to heat in my 97 gmc jimmy whats the problem


blend door sticking not sure if this year has an electronic actuator for the door or not

Sep 19, 2012 | 1997 GMC Jimmy

1 Answer

My a/c will only blow out the defrost in a 97 gmc jimmy


It is either the servo door could be blocked by something like a pencil falling through or something falling and blocking it from opening. Or it is actually broken. I have seen them both ways. Mine was actually broken in my Ford F250. You should still take it in to someone who can deal with it for you.

Apr 09, 2012 | 1997 GMC Jimmy

1 Answer

I have a 97 chevy k2500 the fan works, heat and ac works, the floor vents and dash vents work but cant get any air to blow out of the defrost vents. help i have replaced the control panel, still have...


Your vehicle uses electronically controlled blend doors to direct th air flow from defrost to vent and to the floor . If the door motor is bad then it will stay at a fixed position so you will not get the air to flow out the defrost ducts. There are at least two of these one for air blend and one for fresh air. They are located on the passenger side usually under the plastic cover and have a wire harness that plug in and are usually shaped like a piece of pie.

Mar 03, 2011 | 1997 Chevrolet K2500

2 Answers

98 Jimmy throws out heat but won't switch to all vent options


Your going to have to replace the switch. The switch it self may have gone bad, since it works on a vacuum. It's common for the diaphragm in the switch assembly to go bad, if it's not the switch. Then it's going to be a bad actuator door and will need to be freed up. I have found it to be the switch it self get dirty and the vacuum needed to activate the actuator door is not there.

Good luck and keep me posted. When you turn the switch from defrost to heater, do you hear a air leak??? If you do then it's a good chance that it's the switch it self.

Dec 03, 2009 | 1998 GMC Jimmy

2 Answers

1995 Suburban HVAC - no defrost or vent only floor mode


I have a 1500 chevy picup that did the same thing the control panel (blower, temp, and selector) is what was the problem with mine replaced that and fixed it. Very easy to chg.front of dash pops off control panel pops out 1 plug ( yours may have 2 plugs)
pop back in and your done.

May 28, 2009 | 1999 Chevrolet Suburban

1 Answer

97 Sierra no heat on passanger defrost or floor


I assume you have the dual climate control feature on your truck. it sounds like you have door problems. The heating system has several doors inside the box and duct work that divert the air from defrost to face and feet...i'm not 100% sure if the ones in your truck are electronic or vaccum, but i think they are electronic. From time to time the actuators that control the door go out, as every electric motor does. You need to find the ones that have quit and replace them. It is possible that the arm(s) on the actuator(s) have broken loose from the doors and are working but not pushing or pulling the doors properly...if might help to remove the front seats...just to help save your back....working under the dash is hard on your body....and it take a good half day to remove the dash, so working under it is actually less work.

Feb 28, 2009 | 1998 GMC Sierra

1 Answer

I have a 97 SIERRA. HEAT WORKS FINE ON DRIVERS


If you have climate controls that are "slide type" knobs...likely that the cable that controls the diverter panel in the blower box is broken....

Feb 27, 2009 | 2000 GMC Jimmy

1 Answer

1996 GMC Suburban heater blows on floor


yes those controls are vacuum controlle. Could be as simple as a bad hose or connection.

Feb 18, 2009 | 1999 Chevrolet Suburban

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

23 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76070 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...