Im not sure what they are called but where can i get the two metal/rubber gaskets that go on the lines that attach to the back of the ac compressor? What are they called and are they a gm only part?

 

Are you talking about the O-rings?

The 2 O-rings the same size are 2724577(AC-Delco #15-2722) come both in the kit. The other single O-ring is 52450548(AC-Delco #15-30570).

In the future, call your local dealer and ask for the part number and if they have them and the price. Then punch the numbers in somewhere like gmpartsdirect.com and compare. Then go from there.

 

You can pick them up at your local parts store.. Just make sure you bring in your old ones so they match up.. Cost around 3~4 dollars..