A/C - Refrigerant Loss Prevention

91chevy13

Number: 91-284-1A

Section: 1A

Date: APRIL 1991

Corp. Bulletin No.: 971202R


Subject: AIR CONDITIONING REFRIGERANT LOSS DUE TO LOOSE OR MISSING ACCESS FITTING CAPS


Model and Year: 1980-91 PASSENGER CARS AND TRUCKS





All GM air conditioning Hi side and Low side access fittings are supplied with a black plastic cap and seal assembly which provides the primary refrigerant seal for the service fittings.

If the cap and seal assembly is missing or loose, a significant amount of refrigerant may leak through the valve core located in the access fitting, which could result in poor A/C performance or failure.

When servicing any vehicle's A/C system, make sure all access fitting cap seals (refer to Figure) are in place and tight. Caps should be threaded on until contact with the "O" ring seal is made and then tightened another 1/4 - 1/2 turn to ensure proper sealing.

High Side Low Side
Valve - Cap and Seal Valve - Cap and Seal
P/N 52451233 P/N 6551640

Parts are currently available from GMSPO.