why does my A.C. not work

Asked by May 11, 2015 at 09:16 PM about the 1998 GMC Sierra 1500 C1500 Special Standard Cab LB

Question type: Maintenance & Repair

I have a 1988 GMC Sierra 1500 pickup. I refilled the air with freon and put it up to the right pressure but the pump will still not come on. I hotwired the pump and it kicked in. I'm wondering what the problem may be. The heat works and the air blows good. Just the A.C. pump is'nt working. Any help would be appreciated thanks.

1 Answer

98,335

Low pressure switch failure is the most common. If your pressures are correct then that is most likely your problem.

Your Answer

Add photo

Related Questions

  • why does my A.C. not work 1 answer

    I have a 1988 GMC Sierra 1500 pickup. I refilled the air with freon and put it up to the right pressure but the pump will still not come on. I hotwired the pump and it kicked in. I'm wondering what th...

    1998 GMC Sierra 1500 C1500 Special Standard Cab LB

    -

    Maintenance & Repair

  • why does my climate control not work properly 8 answers

    2008 Sierra ext cab 4WD with climate control blows cold air on one side and hot air on the passenger side and does the opposite in winter. It works well the next day after fixing and then reverts t...

    2008 GMC Sierra 1500 SLE1 Ext. Cab 4WD

    -

    Maintenance & Repair

  • My oil pressure gage does not work properly 1 answer

    My oil pressure gage does not work properly on my 2003 GMC Sierra. The needle is stuck in the position on the gage all the way to the right of the numbers. Could this be a problem with the gage or may...

    2003 GMC Sierra 1500 STD Standard Cab LB

    -

    Maintenance & Repair

  • The Weather option does not work 2 answers

    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

  • The computer port on my GMC truck does not work. Can't read codes, code reader says "No power!" 2 answers

    The check engine light is on my 2003 GMC. The computer port inside the truck has no power to it. Is there a fuse on this circuit or was that optional equiptment on my base model truck? It has a 4.3L ...

    2003 GMC Sierra 1500 STD Standard Cab LB

    -

    Maintenance & Repair

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 5,300
#2 John Saffrahn
John Saffrahn
Reputation 3,660
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 3,340
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,084 Great Deals out of 182,982 listings starting at $1,900
Used Ford F-150
2,146 Great Deals out of 180,735 listings starting at $1,500
Used Dodge Ram 1500
392 Great Deals out of 10,639 listings starting at $1,500
Used Toyota Tacoma
547 Great Deals out of 41,480 listings starting at $2,999
Used GMC Yukon
378 Great Deals out of 20,670 listings starting at $1,495
Used Chevrolet Tahoe
609 Great Deals out of 35,633 listings starting at $1,000
Used Ford F-250 Super Duty
335 Great Deals out of 43,034 listings starting at $1,250
Used Chevrolet Camaro
414 Great Deals out of 31,557 listings starting at $2,395

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
77 Great Deals out of 39,918 listings starting at $23,369
2016 GMC Sierra 1500 For Sale
102 Great Deals out of 3,428 listings starting at $17,439
2015 GMC Sierra 1500 For Sale
111 Great Deals out of 4,417 listings starting at $15,800
2014 GMC Sierra 1500 For Sale
112 Great Deals out of 4,647 listings starting at $12,987
2013 GMC Sierra 1500 For Sale
46 Great Deals out of 1,944 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.