1989 gmc defroster


Asked by Nov 17, 2010 at 06:11 PM about the 1989 GMC Sierra

Question type: Maintenance & Repair

I cant get my fan to blow any air out of the defrost location. it works fine on the vent and feet locations. What should i do to fix this???

4 Answers


take it to a dealer.

Steve Kleinhans

you have a vacum leak, look for a round ball with vacum lines going to it. If it is mounted on the hood make shure the vacum hose is hooked to it'the round ball(vacum Canister) might be lokated in one of the fender wells. Also the vacum line likes to fall off of the engine right where it hooks to the engine definet vacum problem.

3 out of 3 people think this is helpful.

oh thanks sherlock.

3 out of 3 people think this is helpful.

and i mean that to anjy834u

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • 2009 GMC Acadia defroster 1 answer

    i recently started having problems with the defroster not blowing air out of the vent

    2009 GMC Acadia SLT-1


    Maintenance & Repair

  • Defroster 2 answers

    The car defroster stays on even when the Yukon is turned off or on it stays on how do I get this to stop

    GMC Yukon XL


    Maintenance & Repair

  • AC blows air from defroster 2 answers

    The AC air comes through the defrosted.

    2006 GMC Yukon SL


    Maintenance & Repair

  • 2009 GMC Acadia Defroster 1 answer

    My Acadia runs great and I love it! However, the defroster has stopped working. Everything else works fine so not a fuse. The defroster vent just doesnt have anything coming out of it.Before I take ...

    2009 GMC Acadia SLE-1 AWD


    Maintenance & Repair


Looking for a Used Sierra in your area?

CarGurus has 39 nationwide Sierra listings and the tools to find you a great deal.


Search GMC Sierra Questions

GMC Sierra Experts

#1 FordNut
Reputation 190
#2 dandyoun
Reputation 110
#3 Js08016
Reputation 80
View All

Related Models For Sale

Used GMC Sierra 1500"
1,024 Great Deals out of 56,287 listings starting at $2,499
Used Ford F-150"
3,181 Great Deals out of 216,388 listings starting at $1,900
Used Chevrolet Camaro"
812 Great Deals out of 38,799 listings starting at $2,650
Used GMC Sierra 2500"
222 listings starting at $2,895
Used Ford Mustang"
716 Great Deals out of 41,261 listings starting at $900

Used Cars For Sale