1990 ski supreme

Wasn't sure which engine you had so here's a picture for both the 4 and 6 cylinder. I hope this helps.

You can go to a nearby parts store and purchase a Haynes automotive reference guide and it contains all the different diagrams that would need. On the front of the book it would say 1990-94 lumina cutlass etc.

any parts store will have those.

on the side of the valve cover

This car uses r12 freon that is the old stuff but you can have your system converted over to the 134a.

Okay...you don't have the engine size listed but here ya go:

1990 Sutlass supreme will not spark when trying to turn over

Check to see if your electric radiator fan is turning on. These cars are known for the temperature switch that turns on the fan to go bad. Also, a highly overlooked problem, make sure the fins on your radiator and condenser aren't blocked with debris. Shine a flashlight on the opposite side and look through. Good luck!

Tighten the hose.

what motor is it ??