1988 GMC 1500 pickup A C unit. Where would the(Filler), high side be on the AC lines..

Asked by Jul 11, 2015 at 04:36 PM about the 1988 GMC Sierra 1500 C1500 Standard Cab SB

Question type: Maintenance & Repair

3 Answers

28,045

you want to fill the high side? look for the hose that goes into the cab (the low side hose) and along it you will find the fitting > this might help you...when you find it than the other one is the high side.

1 of 1 people found this helpful.
72,395

Kelly's picture is correct BUT it's the low side (as shown in the picture) that you want for charging. NEVER hook up to the high side for charging! HTH. -Jim

72,395

BTW, unless the system has been converted to R134a you have R12 in there which can't be purchased anymore in the United States. -Jim

Your Answer

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 64,158 nationwide Sierra 1500 listings starting at $999.

ZIP:

GMC Sierra 1500 Experts

  • #1
    dragonflyoffshore
    Reputation
    5,450
  • #2
    John Saffrahn
    Reputation
    3,780
  • #3
    Glenn Clingenpeel
    Reputation
    3,470
View All

Related Models For Sale

Used Ford F-150
3,124 Great Deals out of 218,978 listings starting at $1,200
Used Chevrolet Camaro
421 Great Deals out of 31,253 listings starting at $1,450

Used Cars For Sale

2018 GMC Sierra 1500 For Sale
25,604 listings starting at $24,499
2017 GMC Sierra 1500 For Sale
72 Great Deals out of 11,349 listings starting at $20,369
2016 GMC Sierra 1500 For Sale
167 Great Deals out of 4,042 listings starting at $16,404
2015 GMC Sierra 1500 For Sale
203 Great Deals out of 5,544 listings starting at $14,995
2014 GMC Sierra 1500 For Sale
198 Great Deals out of 4,896 listings starting at $9,900

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.