Stingray Al

I have recharged the AC system on my Cadillac on Silverado in the past. However, I can't seem to locate the low pressure AC port on my C7. The high pressure port is stands out. Any help would be appreciated.

Stingray Al

I found it. It is located on the firewall by the dry sump oil fill

dashotgun

hm how about a picture for the rest of us

raylo

Do you have a leak? Where?

dashotgun

I found it also , lookinng from the front of the car it is between the dry sump acces and the valve covers. How the hell did you get to it? I cannot fathom getting my hand down there. I am a retired surgeon and I am used to working blind in tight spaces but this seems impossible without removing a lot of stuff or a special tool. My ac runs a bit warm( 2016 z 51) and I wanted to check it with the diy gauge and add some freon. Pending a tip from any one may have to involve the dealer. It has become so hard to work on your car. If anyone wants I will post a picture

raylo

Doesn't look too bad. Probably just have to remove a couple of plastic beauty covers to get your hand and gauge connector in there.

atljar

Unbolt the coolant tank (don't have to disconnect lines) and you can get to it easily

raylo

Here you go. On the firewall in between the coolant reservoir and passenger side coil cover. Looks like if you remove the intake and coil beauty covers you'd be able to get in there... or as noted by atljar above free up the coolant reservoir that appears to be mounted with 2 easy to access bolts.

wrecker3

When there is no access to the low side port and have a A/C machine you can suck out the charge then pull a vacuum and charge the correct amount on the high side port with motor off.