not getting power to ac compressor. 1988 GMC 3500

Asked by SteveR68 Jun 14, 2016 at 07:00 PM about the 1988 GMC Sierra C/K 3500

Question type: Maintenance & Repair

clutch will engage when jumped, 2 prong plug that connects to compressor has no power. Any ideas? Thanks

4 Answers
41,805

Auto_Centric answered 7 years ago

Pressure switch on the accumulator tank is probably keeping It shut down is the AC cold when jumped? Check R134a high and low side Psi readings

Mark helpful

SteveR68 answered 7 years ago

I did not leave it jumped at the low pressure switch very long, just long enough to see if compressor would kick on. How long can I keep it jumped at the switch? Thanks

Mark helpful

SteveR68 answered 7 years ago

I jumped the low pressure switch and added a can of R134, It is leaking ant connection going into firewall from accumulator tank. Will there be an o-ring and will I need to have a vacuum pulled in order to charge? Thank you

Mark helpful
41,805

Auto_Centric answered 7 years ago

Pay $85-100 and have it evacuated, checked for leaks 30mm of vacuum ...and filled with the correct oil PAG,# and amount. Then filled to the correct weight ONLY proper way, of refrigerant 134A. That's what I suggest..

Mark helpful

Your Answer:

Related Questions

  • not getting power to ac compressor. 1988 GMC 3500 4 Answers

    clutch will engage when jumped, 2 prong plug that connects to compressor has no power. Any ideas? Thanks

    1988 GMC Sierra C/K 3500

    -

    Maintenance & Repair

  • 1999 gmc 1 ton 2 Answers

    I have a 1999 gmc 1 ton dually. It's 2 wheel drive. All of the sudden on a road trip the trans started to slip. Now it will go about 50 miles on a cold start then start slipping. I have changed th...

    GMC Sierra C/K 3500

    -

    Maintenance & Repair

  • Why my front brakes keep getting jammed ??? 1 Answer

    Greetings and help !; I have a 1990 GMC K3500HD 4WD lifted with a 454 engine. Front brakes tend to jam and heat up when it goes into operational temperature. Already replaced calipers, pads, discs and...

    1990 GMC Sierra C/K 3500

    -

    Maintenance & Repair

  • No fuel to carb 2 Answers

    I Arced or crossed the "lighter" wires and fuel pump stopped. Fuse is good. But do not know how to check fuel pump relay.

    1994 GMC Sierra C/K 3500

    -

    Maintenance & Repair

  • how much would you pay for a 1988 gmc 3500 v8 2 Answers

    1988 gmc 3500 v8 and 125,000 miles

    1988 GMC Sierra C/K 3500

    -

    Shopping & Pricing

Sierra C/K 3500

Looking for a Used Sierra C/K 3500 in your area?

CarGurus has thousands of nationwide listings and the tools to find you a great deal.

Postal Code:

Shortcuts

Search GMC Sierra C/K 3500 Questions

CarGurus Experts

  • #1
    Jake Thompson
    Reputation
    20
  • #1
    Michael Embry
    Reputation
    20
  • #1
    rpedgar
    Reputation
    20
View All

Find great deals from top-rated dealers

Search

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.