Hey been strugling with the A/C in my Buick Rendezvous here weird thing to figure out first thing in The Am the air will cool the car offf to 30deg. farenheight But later on in the day like when its in the 80"* heck luck if it reaches 75
So my question is Is the ambient air switch fowled & where is it located if one knows my Rendezvous not equiped with the outside unit

did you check the pressures it sounds under charged to me

x2 on the pressure. Your system probably needs a charge.

Nope system is charged to it'* Max allowable !!

Did you change the reciever / drier and orfice tube. Possible overcharge.

No nothing was changed & Yes overcharged ended up being ! bad stuff O/A Duracool !!!