AIR CONDITIONING DOES NOT COOL/DEX-COOL

SUBJECT: AIR CONDITIONING DOES NOT COOL/DEX-COOL(R) LEAK AT REAR OF VAN/ENGINE OVERHEAT (REPAIR REAR HVAC SYSTEM LIQUID LINES)

MODELS: 1996 CHEVROLET AND GMC G VAN MODELS (PLANT VIN CODE 1) WITH REAR HEATER AND REAR AIR CONDITIONING (RPOS C36 + C69)

CONDITION:

AN OWNER MAY REPORT THAT THE AIR CONDITIONING DOES NOT DELIVER COLD AIR AND/OR ENGINE DEX-COOL(R) TO THE REAR HEATER IS OBSERVED LEAKING ON THE GROUND BEHIND THE LEFT REAR TIRE OR THE ENGINE OVERHEATS.

CAUSE:

THE REAR HVAC LIQUID LINES MAY BE LEAKING. THE LEAK IS DUE TO IMPROPER LINE ORIENTATION (TWISTED OR ONE ON TOP OF THE OTHER) IN THE AREA SHOWN IN FIGURE 1, CAUSING THE LINES TO CHAFE AGAINST ONE ANOTHER OR AGAINST THE LEFT REAR SPRING SHACKLE BOLT.

CORRECTION:

REPAIR THE HVAC LIQUID LINES USING KENT-MOORE REPAIR KIT J- 41425 FOLLOWING THE SERVICE PROCEDURES DESCRIBED IN SECTIONS 1A AND 1B OF THE SERVICE MANUAL. WHEN REINSTALLING THE LINES, THEY SHOULD BE ORIENTED SO THAT THEY DO NOT MAKE CONTACT WITH ONE ANOTHER AND THERE IS ADEQUATE CLEARANCE TO THE SPRING SHACKLE BOLT.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION DESCRIPTION LABOR TIME D2737 PIPE(S), HEATER - REPLACE USE PUBLISHED D3093 LINES, REFRIGERANT - REPLACE LABOR OPERATION FRONT TO REAR UNIT TIME

IMPORTANT: LABOR OPERATION IS CODED TO BASE VEHICLE COVERAGE IN THE WARRANTY SYSTEM.

FIGURES: 1

CAPTION: REAR HVAC LIQUID LINES

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

COPYRIGHT 1996 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.