2014 GM Truck - Compressor?

Friendly format provided to inquire about automotive a/c systems.
Archived Forum

Moderators: bohica2xo, Tim, Dougflas, HECAT

spurshooter
Posts: 5
Joined: Sun Mar 12, 2017 2:14 pm

2014 GM Truck - Compressor?

Postby spurshooter » Sun Mar 12, 2017 2:29 pm

I've worked on a couple earlier (2008 & 2000) GM truck AC systems, but this one has some differences and I don't have manuals for it. I was a member here years ago and learned the basics of servicing here. But my account seems to be gone.

I noticed my AC isn't cooling yesterday. I only drive the truck about half the month, but lately, I don't think we needed AC anyway and the climate control was probably just heating with the cool weather we had been having.

In the past few days we've had warm weather in Socal and I couldn't get cool air. I put the gauges on it and got essentially no pressures. I put a can in it and the clutch engaged, but pressures were only about 30 psi. with the clutch engaged. Today, I pulled the big air cleaner box out of the way and cleaned up the engine bay in anticipation of having to do some work in there.

I noted that the compressor (clutch snout) was free to turn with no resistance, none! Do I have a broken shaft? Or is the clutch different on a 2014 GM truck?

Also, I'd like to pull the orifice and check it to see how bad a situation I'm dealing with, but I don't see an obvious location for an orifice/screen. I'd appreciate a little guidance/advice with this system.

Thanks much
spurshooter
Posts: 5
Joined: Sun Mar 12, 2017 2:14 pm

Re: 2014 GM Truck - Compressor?

Postby spurshooter » Sun Mar 12, 2017 3:41 pm

I pulled the low and high lines to the evaporator at the firewall. The PAG looks clean. (whew).

I'll pull the system down and isolate it next to see if I have leaks.
spurshooter
Posts: 5
Joined: Sun Mar 12, 2017 2:14 pm

Re: 2014 GM Truck - Compressor?

Postby spurshooter » Sun Mar 12, 2017 6:48 pm

The system won't hold a vacuum. Goes to ambient in a few minutes.
User avatar
Cusser
Posts: 90
Joined: Sun Apr 24, 2016 6:29 am

Re: 2014 GM Truck - Compressor?

Postby Cusser » Mon Mar 13, 2017 7:39 am

spurshooter wrote:The system won't hold a vacuum. Goes to ambient in a few minutes.


Big leak.
spurshooter
Posts: 5
Joined: Sun Mar 12, 2017 2:14 pm

Re: 2014 GM Truck - Compressor?

Postby spurshooter » Mon Mar 13, 2017 10:04 am

Cusser wrote:
spurshooter wrote:The system won't hold a vacuum. Goes to ambient in a few minutes.


Big leak.


:lol: Yup.
spurshooter
Posts: 5
Joined: Sun Mar 12, 2017 2:14 pm

Re: 2014 GM Truck - Compressor?

Postby spurshooter » Mon Mar 13, 2017 5:04 pm

This old board seems pretty slow. Did some of the resident experts find a new home?

Return to “Automotive Air Conditioning Forum”