2004 Holiday Rambler Vacationer Dash air problem

[sdp001]

My 2004 HR vacationer has the 8.1 workhorse chassis. I am having issues with my dash AC. I found the low pressure port where you can add the freon but I cannot locate the high pressure port. I suspect it has had to much freon put in the system and is causing the cooling issue. I want to hook up the gauges and see what the high side pressure is but I cannot find the port. I have followed the lines the best I can and also removed the doghouse and looked at the compressor. No luck. Any suggestions would be appreciated.

I am a rookie at this rv stuff. ( Just purchased this one 2 month's ago) but work on my other vehicles all the time.

Would the dryer and expansion valve be the same as a 2004 chevy suburban with the 8.1 engine

[CJ7365]

The high pressure port is close to the compressor, I can reach mine through the front, but removing the dog house might be easier.

Here is an accumulator that will fit. https://www.comfortairgr.com/shop/re...vcs-054-00139/

not sure about the expansion valve but if you call the guys from above link they might be able to help you out.

[Charlie 5320]

The high side port is about 16" in front of the compressor. Be very careful when accessing it, it doesn't have a schrader valve in it like most do. It has some type of rubber ball, and very easily damaged. I just had to cut the old valve out of my 03 because when I took my gauges off after charging, that old valve leaked. Just so you know that valve can be replaced, but it's not an easy job. Dorman makes a replacement valve, so you have to cut the old valve out and the new valve has compression fittings and seals. Good luck.