When installing the high-pressure switch in the rear head of the new compressor, is a new O ring required?

1999 GMC SIERRA
27,000 MILES • 5.3L • V8 • 2WD • AUTOMATIC
Avatar
43ZX2
  • MEMBER
  • 9 POSTS
High Pressure Switch Installation on new Replacement A/C Compressor. When installing the high pressure switch in the rear head of the new compressor, is a new O ring required, or can one simply remove the snap ring and plug and install the switch?
Jul 22, 2024 at 1:04 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
STRAILER
  • CAR REPAIR CONTRIBUTOR
  • 54,189 POSTS
Usually, the O ring will be okay because it was new at the factory when they assembled the new compressor. For clarification I included a diagram so we can be on the same page. Check out the images (below). Let us know if you need anything else.
Image (Click to enlarge)
Attached Media
Jul 22, 2024 at 1:40 PM
Advertisement
Avatar
43ZX2
  • MEMBER
  • 9 POSTS
Thanks Ken.
Jul 22, 2024 at 1:42 PM
Avatar
STRAILER
  • CAR REPAIR CONTRIBUTOR
  • 54,189 POSTS
You are welcome, please use 2CarPros anytime we are here to help.
Jul 23, 2024 at 9:03 AM
Avatar
43ZX2
  • MEMBER
  • 9 POSTS
I'll check the O ring for any sign of damage when I remove the plug.
Jul 24, 2024 at 6:33 AM