No heat

Asked by Jan 23, 2016 at 08:10 AM about the 1999 GMC Sierra 1500 SLT 4WD Extended Cab SB

Question type: Maintenance & Repair

Hvac works, but no heat is generated. Any thoughts?

2 Answers

19,200

Low on anti freeze, thermostat needs to be replaced, radiator fan not working, blend door is not switching over from A.C to heat, this is just a few things but a little bit more information on what is going on would be helpful to diagnosis better.

20

Also in front of the engine where the grille is you may have a bad inter cooler. Best thing would be to put a piece of cardboard behind the the grille so the the engine doesn't blow cold air into your cat

Your Answer

Add photo

Related Questions

  • No heat 2 answers

    Hvac works, but no heat is generated. Any thoughts?

    1999 GMC Sierra 1500 SLT 4WD Extended Cab SB

    -

    Maintenance & Repair

  • No heat any ideas? 7 answers

    Ive got a 95 gmc 1500. I recently replaced the heater core along with the hose from the core to the water pump and hose assembly to the block. I have no heat and my fan will blow light at time th...

    1995 GMC Sierra 1500

    -

    Maintenance & Repair

  • 1995 gmc k1500 4wd does not heat replaced thermostat but still no heat 5 answers

    And now temperature gauge keeps going from like 150 to like 260 like to over heat the it goes back down again then eventually climbs back up to overheat again then drops back down and keeps doing that...

    GMC Sierra 1500

    -

    Maintenance & Repair

  • no heat until I kick the gas pedal down any ideas? 1 answer

    Digital dual zone heating/ac that has no heat unless I kick down the gas. If the truck idles for a few minutes it will start blowing cold air out the vents again sometimes. As far as I know there is n...

    2005 GMC Sierra 1500 SLT 4WD Crew Cab SB

    -

    Maintenance & Repair

  • no heat 4 answers

    The thermostat is at 110 and it is not getting hot so Im not getting any heat. I have luke warm air coming through the vents. There is antifreeze in there. It is blowing air out but not hard

    2004 GMC Envoy 4 Dr SLT 4WD SUV

    -

    Maintenance & Repair

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 5,270
#2 John Saffrahn
John Saffrahn
Reputation 3,640
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 3,330
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,976 Great Deals out of 183,630 listings starting at $1,595
Used Ford F-150
2,129 Great Deals out of 191,043 listings starting at $290
Used Toyota Tundra
471 Great Deals out of 34,462 listings starting at $1,950
Used Dodge Ram 1500
410 Great Deals out of 10,899 listings starting at $1,000
Used Toyota Tacoma
570 Great Deals out of 42,603 listings starting at $1,995
Used GMC Yukon
425 Great Deals out of 20,534 listings starting at $1,495
Used Chevrolet Tahoe
588 Great Deals out of 33,589 listings starting at $1,375
Used Ford F-250 Super Duty
337 Great Deals out of 43,835 listings starting at $1,450
Used Chevrolet Camaro
367 Great Deals out of 31,402 listings starting at $2,400

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
83 Great Deals out of 43,360 listings starting at $21,025
2016 GMC Sierra 1500 For Sale
108 Great Deals out of 3,478 listings starting at $16,595
2015 GMC Sierra 1500 For Sale
105 Great Deals out of 4,317 listings starting at $12,899
2014 GMC Sierra 1500 For Sale
102 Great Deals out of 4,272 listings starting at $13,995
2013 GMC Sierra 1500 For Sale
47 Great Deals out of 1,974 listings starting at $8,999

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.