2005 Buick Terraza CXL 6 Cyl 3.5L
Body & Interior
A/C air is not cold enough
When adding R-134a to this car, the high side guage needle starts vibrating at 250 psi. This seems low. Where is the hot gas bypass valve and how do I replace it. The discharge air temp is 80 degrees when the outside temp is above 90 and the a/c has been running for 20 minutes. This is very annoying on long summer trips.
You will need to replace your expansion valve. It's located somewhere near the glove compartment.