Compressor Pressure Relief Valve Install (HT6/HD6/HU6)

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required:

J 43600 ACR 2000 Air Conditioning Service Center
J 39400-A Halogen Leak Detector

Clean the valve seat area on the rear head.
Lubricate the O-ring of the new pressure relief valve (5) and the O-ring assembly using new 525 viscosity refrigerant oil.
Install the new pressure relief valve (5). Tighten the new valve to 9.0 N.m (80 lb in).

Fig 1: Pressure Relief Valve

Courtesy of GENERAL MOTORS CORP.

Evacuate and recharge the system using the J 43600 .
Leak test the fitting(s) of the repaired or reinstalled component using the J 39400-A .