Heater on 2005 Sierra does not work

Asked by MOAppr Feb 24, 2010 at 07:16 PM about the 2005 GMC Sierra 1500 SLT 4WD Extended Cab SB

Question type: Maintenance & Repair

I bought a 2005 Sierra SLT with 42k miles on it on Saturday 2/20/2010 from a used car dealer.  The truck looks and runs great, ran a car fax and car check and it was rated  at 93 on car check.  The truck was fine until I ran it through the car wash today and now it wants to blow cold air and the heater will not come on.  The temp guage is showing normal, could this be the heater core?  

3 Answers
45

Reaper answered 14 years ago

doubtful its the core, look for a vacumm leak under the hood running to the firewall. the force of the air blowing off the car can cause this problem.

4 people found this helpful.
Mark helpful
2,275

Joe answered 12 years ago

could be blower resistor and harness , water entered blower box

4 people found this helpful.
Mark helpful
80

DDegenstein answered 5 years ago

Heater is not blowing any hot air after the 2005 Sierra gmc is running for awhile you can feel warm air seeping out if the vents nit sure what the problem could be

8 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • Heater on 2005 Sierra does not work 3 Answers

    I bought a 2005 Sierra SLT with 42k miles on it on Saturday 2/20/2010 from a used car dealer. The truck looks and runs great, ran a car fax and car check and it was rated at 93 on car check. The tr...

    2005 GMC Sierra 1500 SLT 4WD Extended Cab SB

    -

    Maintenance & Repair

  • Heater on my 01 GMC Sierra doesnt fully work 3 Answers

    Last summer, on cool mornings, I noticed that the heater didnt start blowing hot air once up to temp. Later in the day when it was hot out, I went to turn the temp to cool, it kept blowing hot air for...

    2001 GMC Sierra 1500

    -

    Maintenance & Repair

  • 2005 GMC Sierra heater/ac will not blow. Clicking/buzzing in dash 2 Answers

    36,000 miles bought used. First 4x4 service light was on and sometimes 4x4 will not engage. Now heater/ac will not blow at all. I smelled a musty odor before it quit.

    2005 GMC Sierra 1500 SLE Extended Cab LB

    -

    Maintenance & Repair

  • Lights on 95 GMC Sierra 1500 not working properly 2 Answers

    I bought a 95 GMC Sierra 1500 knowing it had problems so I decided to replace all the lights my high beam work but my low beam wont work on driver side my turn signals do work in the front but sup...

    1995 GMC Sierra 1500 K1500 SLE 4WD Extended Cab LB

    -

    Maintenance & Repair

  • The Weather option does not work 1 Answer

    I only get a message that says the service is temporarily out of service. I do not pay for Onstar. I called the dealer and they tell me that Onstar and the Weather option are connected.

    2015 GMC Sierra 1500 SLE Crew Cab

    -

    Maintenance & Repair

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 8,348 nationwide Sierra 1500 listings starting at $5,975.

Postal Code:

Shortcuts

Search GMC Sierra 1500 Questions

CarGurus Experts

  • #1
    yetilikesbeer
    Reputation
    12,330
  • #2
    dragonflyoffshore
    Reputation
    11,480
  • #3
    John Saffrahn
    Reputation
    11,430
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Silverado 1500
198 Great Deals out of 8,239 listings starting at $6,995
Used Ford F-150
346 Great Deals out of 13,355 listings starting at $3,000
Used GMC Sierra 2500HD
43 Great Deals out of 2,198 listings starting at $8,490
Used Toyota Tundra
35 Great Deals out of 987 listings starting at $10,698
Used Chevrolet Silverado 2500HD
29 Great Deals out of 1,716 listings starting at $12,995
Used GMC Yukon
19 Great Deals out of 953 listings starting at $5,998
Used Toyota Tacoma
31 Great Deals out of 724 listings starting at $9,975
Used Dodge RAM 1500
95 listings starting at $9,594
Used Chevrolet Tahoe
12 Great Deals out of 841 listings starting at $698
Used Ford F-250 Super Duty
29 Great Deals out of 774 listings starting at $4,290
Used GMC Canyon
28 Great Deals out of 921 listings starting at $5,477
Used Dodge Charger
36 Great Deals out of 913 listings starting at $5,495
Used Chevrolet Corvette
28 Great Deals out of 646 listings starting at $10,989

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. Content will be removed if CarGurus becomes aware that it violates our policies.