Ac low side service port, where is it????

[big_b_in_PA]

Hey guys I'm hoping some one here can point me to where the low side port is on my 2003 Denali. I was pretty sure it was next to the receiver/ dryer canister, but when I hooked the gauge up to it, it maxed it out! Any hints as to where the right port is at, or is my system fubared? The only reason I'm messing with it is it's blowing warm air at idle, but cold when moving. I'm pretty sure the fan clutch is t the culprit, because the engine temp doesnt spike, it remains around 195-205. Any ideas?

 

[Riff Raff]

get e-fans

you'll be cold at idle

 

[SunlitComet]

Either debris is clogging the condenser or fan clutch is slipping under high heat.

 

[SunlitComet]

oh and see if the fittings are on the right side of engine on lines from compressor.

 

[big_b_in_PA]

Washed the heck out of the condenser last night, and there are ports on the right side of the engine bay, but they are both on the High side line. One is before the orifice tube, and one after.