Thread: A/C layout?
View Single Post
Old 05-16-2011, 11:26 PM   #2
AzDon
Registered User
 
AzDon's Avatar
 
Join Date: Oct 2008
Location: Lake Havasu,AZ
Posts: 202
Re: A/C layout?

Yeah.... I bought a factory wiring schematic that makes no sense!
What is it that you are unclear about? Is there stuff missing? The underhood layout is basically the same on all GM vehicles from that era to present. The only difference with dual air is that both the high and low pressure lines have a "tee" in them for the lines to the rear. Front and rear can each be wired to run independently since the freon path is in parrallel rather than in series. The "kit" to convert to 134a is basically just the two freon fittings and some "conversion" oil. My preference is to buy the fittings seperately, a can of PAG150 oil, replace the reciever/dryer (GM has a different name for it that escapes me right now) and be sure to install a high/low compressor shutoff switch on the high side in place of the stock low switch because the system can literally explode past 300 psi, which these systems are capable of on 134.
AzDon is offline   Reply With Quote