The Dark Green Wire should be the hot to the air compressor clutch and Black should be ground.
The hot wire bypasses the ignition.
Green is the hot wire for my 2004 Chevy Colorado.
Most likely the rear expansion tube or valve is defective.
The large red wire is the battery or hot wire.
Red is hot, black is not.
2001 Chevy suburban runs hot because the engine is heated up. There is heavy load coming upon the engine so it gets heated up.
You don't. You repair it
THE # 1 IS
Run a constant "Hot" wire to window fuse circuitry
No pulse signal to injectors (bad injector relay or PCM driver circuit).
normally the blue and red wires are hot white is standaed for nutral,