heater problems

Asked by Oct 30, 2010 at 04:01 PM about the 1999 GMC Jimmy 2 Dr SLS Sport 4WD SUV

Question type: Maintenance & Repair

My heater will not blow air towards the bottom (my feet) it only blows out of the front window vents and the vents facing the middle of the vehicle.  Someone said it might be a fuse? Is it blocked or is there a way to fix this without costing me alot of dough? Any advice would be helpful. Thanks
Mike

5 Answers

25

Sounds like a mode door motor is inop. Very common on these vehicles. The key is finding where it is located. It could be the one behind the glove box. The motors are not very expensive. Accessing them can be however. This is not a fuse issue

2 out of 2 people think this is helpful.
50

Hey Cameron .. my heater motor quit on my last night .. how expensive are they? And .. unfortunately I saw you messaged they are not easy to get at. Where abouts are they? Under the dash on pass side? Cheers

5 out of 5 people think this is helpful.
3,015

I would recommend rolling all the windows up, with the vehicle and radio off and the blower on the lowest speed attempting different mode settings. If you can hear a motor noise, popping, tapping, etc than more likelier than not you have a broken mode door which means your removing your dash to get to the HVAC case assembly (not fun). Odds are the actuator is ok. As to not blowing at all, it could be a shorted blower motor, blower motor resistor, fuse, short, etc. If youre exhibiting all these things, you could also have a blown heater core which is causing all these issue. Remove the glove box door and behind it should be your blower motor resistor. Remove it and inspect for coolant. Also, you might be able to see the mode door concern as well.

2 out of 2 people think this is helpful.
35

Dont for get the system is vacum so you might have a vacum leak thats why it wont swith over settings

3 out of 3 people think this is helpful.

We have a gm 1999 Envoy and everytime we try and put on heat all it is blowing cold Air? is there a fuse or it is the heating system?

Your Answer

Add photo

Related Questions

  • What do I need to replace/repair to fix the heater in my 1997 GMC Jimmy? 1 answer

    The heater in my 1997 GMC Jimmy does not always work. When we first get in the car (out of the garage in winter), the blower motor works - and then stops at some point later, starting and stopping r...

    1997 GMC Jimmy

    -

    Maintenance & Repair

  • my gmc jimmy has been nothing but a problem since it hit 34,000 miles....anyone else have problems with theirs? 4 answers

    - the gas line broke - a hole rotted through the gas tank as well (vehicle was 4 years old) - when the wheels were taken off for a brake change, the backer plates - crumbled and fell off ( vehicle...

    GMC Jimmy

    -

    Maintenance & Repair

  • ABS Problem 2 answers

    the ABS in my 1992 GMC Jimmy is not working,(NO ABS when braking), no error message on dash board, what should I do to solve this problem?

    1992 GMC Jimmy 4 Dr SLT 4WD SUV

    -

    Maintenance & Repair

  • Brake Problems 7 answers

    I noticed a grinding noise coming from driver side rear wheel a few days ago. Upon investigating, I found calipers had seized and pads were down to nothing. I replaced the pads on both sides but I ...

    2000 GMC Jimmy 4 Dr SLE 4WD SUV

    -

    Maintenance & Repair

  • Cooling problem 2 answers

    The temp gauge goes to hot rapidly and the it blows cold air. If you turn down the heat warmer air comes back eventullay and the temp gauge goes back to normal. Any ideas? 2000 Jimmy

    2000 GMC Jimmy

    -

    General

Jimmy

Looking for a Used Jimmy in your area?

CarGurus has 288 nationwide Jimmy listings starting at $1,995.

ZIP:

Search GMC Jimmy Questions

GMC Jimmy Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 280
#2 tennisshoes
tennisshoes
Reputation 240
#3 1oldman
1oldman
Reputation 220
View All

Related Models For Sale

Used Chevrolet Blazer
1,340 listings starting at $1,995
Used GMC Sierra 1500
938 Great Deals out of 62,237 listings starting at $1,395
Used Chevrolet Silverado 1500
2,283 Great Deals out of 155,210 listings starting at $1,395
Used Chevrolet Tahoe
775 Great Deals out of 28,432 listings starting at $1,500
Used GMC Yukon
517 Great Deals out of 17,114 listings starting at $1,799
Used Toyota 4Runner
319 Great Deals out of 20,540 listings starting at $2,295
Used Jeep Grand Cherokee
840 Great Deals out of 68,654 listings starting at $864
Used Chevrolet S-10
9 Great Deals out of 1,654 listings starting at $2,450
Used Chevrolet Camaro
283 Great Deals out of 38,314 listings starting at $1,250
Used Ford F-150
2,691 Great Deals out of 211,555 listings starting at $1,000
Used Ford Explorer
940 Great Deals out of 73,742 listings starting at $750
Used Jeep Wrangler
392 Great Deals out of 19,082 listings starting at $3,000
Used Jeep Cherokee
347 Great Deals out of 55,344 listings starting at $2,295