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 of 2 people found this 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 of 5 people found this helpful.
3,135

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 of 2 people found this helpful.
35

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

3 of 3 people found this 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

  • heater problems 5 answers

    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 ...

    1999 GMC Jimmy 2 Dr SLS Sport 4WD SUV

    -

    Maintenance & Repair

  • heater blower 3 answers

    i replaced the heater bloer resistor and still have nothing...help

    2000 GMC Jimmy 4 Dr SLE 4WD SUV

    -

    Maintenance & Repair

  • Heater motor done? 1 answer

    Heater motor would make a crazy whining/grinding sound every once ina while .. and last night, it just plain quit on me. Sound like a fuse/relay or fan motor failure?

    1990 GMC Jimmy 2 Dr STD 4WD SUV

    -

    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

  • 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

Jimmy

Looking for a Used Jimmy in your area?

CarGurus has 274 nationwide Jimmy listings starting at $2,495.

ZIP:

Search GMC Jimmy Questions

GMC Jimmy Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 280
#2 tennisshoes
tennisshoes
Reputation 260
#3 1oldman
1oldman
Reputation 240
View All

Related Models For Sale

Used Chevrolet Blazer
3 Great Deals out of 1,188 listings starting at $1,820
Used GMC Sierra 1500
760 Great Deals out of 69,126 listings starting at $1,850
Used GMC Yukon
382 Great Deals out of 19,299 listings starting at $2,000
Used GMC Envoy
62 Great Deals out of 2,161 listings starting at $850
Used Chevrolet S-10
5 Great Deals out of 1,310 listings starting at $2,695
Used Ford F-150
2,058 Great Deals out of 207,340 listings starting at $1,499
Used Chevrolet Tahoe
559 Great Deals out of 31,371 listings starting at $1,500
Used Chevrolet Silverado 1500
1,764 Great Deals out of 181,202 listings starting at $250
Used Dodge Ram 1500
411 Great Deals out of 10,833 listings starting at $1,400
Used Toyota 4Runner
260 Great Deals out of 19,021 listings starting at $2,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.