[trackbird]

Apparently all of those letters I keep getting in the mail about class action law suits about the 2015 (and similar) Silverado trucks have some merit. My AC isn't cooling (now that the weather is warm) and close inspection revealed a cracked high pressure AC line at the compressor. I figured this out after putting gauges on it and finding 18 psi on the low pressure side (it should be around 35 psi). It seemed to be leaking freon almost as fast as I was putting it in. Ultimately, I ordered new high and low pressure lines (from the compressor and to the compressor), an expansion valve and drier assembly. Add in freon and new belts and I'm looking at about $550 in parts...give or take.

Apparently these trucks are known for compressor issues, high pressure line issues and there's a weld in the condenser that's known to crack. I sprayed soapy water on the condenser and I didn't see any bubbles. Tomorrow, I'll tear it all apart and swap out the lines. I'm hoping this doesn't turn into an all day event....

I've also learned that we now have "stretch fit" belts that don't use an idler pulley. I hadn't run into this before and sadly I didn't find it in time to get the proper tools delivered. However, my neighbor is a former dealer tech and a newly minted Matco dealer. He happened to have a few of the tools GM used to send with new belts, so he gave me a set of those so I can hopefully get the belt on without too much drama.

I'll keep you posted.

[Eredin]

I had a 16 Sierra and got tired of the payment and incompetent dealership techs. Every time I tried to get something fixed under warranty, they literally broke it worse to the point that I had to do it myself every time. Dumped it for a minty 03 Sierra 2500HD gasser and haven't looked back. As far as the AC goes, the blend doors have the inherited gmt900 problem where they need reset. IIRC, you can pull the relay on them in some order and reset it. Easy way to test is to check the driver versus passenger side temps. Just wanted to toss that out there, since it's related to the subject matter and free to check versus gutting the AC.

[trackbird]

I had a 16 Sierra and got tired of the payment and incompetent dealership techs. Every time I tried to get something fixed under warranty, they literally broke it worse to the point that I had to do it myself every time. Dumped it for a minty 03 Sierra 2500HD gasser and haven't looked back. As far as the AC goes, the blend doors have the inherited gmt900 problem where they need reset. IIRC, you can pull the relay on them in some order and reset it. Easy way to test is to check the driver versus passenger side temps. Just wanted to toss that out there, since it's related to the subject matter and free to check versus gutting the AC.

That's good to know. In this case we could see the oil leaking out of the seal/line where the high pressure line meets the compressor. We replaced the hoses, expansion valve, seals, etc and pulled a vacuum, then recharged it. So far, so good. Though I wonder if I need to put a touch more freon in it. I'm not sure it's quite as cold as it was. I guess I need to take a thermometer with me in my work truck (I have a company truck that's the same year and engine Silverado, but it's a regular cab, long bed in 2wd) and compare the discharge temps between them on the same day.