Automotive Air Conditioning Information Forum

I left the system under a light nitrogen charge as I had to leave town for few days, I will charge it when I get back home. I've got a 2000 3500 Silverado Dually crew cab which was my father's also, which I'm driving back to Phoenix this week, which will be next in line for some AC tune up. My dad ...

Image of the charge specs for 1999 YUKON TAHOE SUBURBAN

https://i.postimg.cc/SxPDkqyP/IMG-2653.jpg

Thanks for the additional specs. After 26 years and a misplaced orifice tube, who knows if that accumulator is original. I'm guessing it is because the decal is a GM decal. I'll charge to that spec and report back on temps and pressures. I wonder if there was a TSB or other guidance from GM to ...

Ditch the electric fan and get the original clutch fan and shroud. Most manufacturers had a different fan for AC cars than non AC cars. Ie, 7 blade vs 5 blade.

Thanks John.

The round sticker was present on the accumulator, which I believe to be original. It states two service charge amounts, one for the "4 door utility" and one for the "suburban" I'm assuming the Yukon and Tahoe are the "4 door utility". It states 2 lbs, 12 oz for the 4 door utility ...

Found a Sanden 4440 in captivity here in PHX. That HT6 design is beyond reasoning why they would introduce so many points of seal failure. Now, on to a vacuum / leak test.

Thanks John. I'm on the hunt for a Sanden (single case) compressor. Checked with Tim and he would have to order it in or drop ship it. Would like to compare the units in person. I reused the OT because I didn't have another one in hand and it looked new and came out undamaged. This was installed ...

Hey guys, back working on another project.

1999 GMC Yukon SLE 5.7L with rear AC. Was my late fathers and I brought it down to Phoenix from South Dakota and getting the AC working is on the top of the list. Vehicle sat in the garage for many years and is in great shape.

Issue #1. No charge at all ...

Success.

After doing more homework I found that the replacement ACC (air conditioning controller) which was a field replacement for a rash of failed controllers. Finding the literature for that states the original thermistor to be left in place, and to drill a small hole in the access panel and ...

I'd be tempted to just leave the troublesome one out of the picture and see what happens.

Thermistors are used in resi AC to help the controller that runs the variable speed fan motors (which is a hoax). These thermistors are constantly burning up, costing homeowners major bucks


That's what I ...