POOR A/C PERFORMANCE (REPL. TEMPERATURE CONTROL CABLE). Chevrolet Caprice 1994

SUBJECT: POOR A/C PERFORMANCE (REPLACE TEMPERATURE CONTROL CABLE)

MODELS: 1994 CHEVROLET CAPRICE FOR VEHICLES BUILT BEFORE VIN RR134901

CONDITION:

CUSTOMERS MAY COMMENT ABOUT INSUFFICIENT A/C PERFORMANCE WHEN IN THE A/C MODE, AT THE FULL COLD SETTING.

CAUSE:

THE TEMPERATURE CABLE DOES NOT ALLOW THE TEMPERATURE VALVE TO FULLY SEAT IN THE FULL COLD SETTING.

DIAGNOSIS:

REFER TO THE AIR CONDITIONING PERFORMANCE TEST, SECTION 1B, PAGE 6, AND THE SYSTEM PERFORMANCE CHART (FIGURE 5) TO VERIFY THE PROBLEM.

CORRECTION:

IF OPERATING TEMPERATURES ARE FOUND TO BE OUT OF THE NORMAL RANGE, VERIFY THAT THE TEMPERATURE VALVE DOOR IS SEATING IN THE FULL HOT AND FULL COLD POSITIONS. THIS CAN BE DONE BY QUICKLY ROTATING THE TEMPERATURE KNOB AND LISTENING FOR DOOR CLOSURE.

IF THE DOOR CANNOT BE HEARD SEATING, INSTALL A NEW TEMPERATURE CABLE (P/N 10265205). THE NEW CABLE IS SET TO ALLOW SEATING AT THE TEMPERATURE VALVE IN FULL COLD AND FULL HOT POSITIONS.

TO REPLACE THE CABLE FOLLOW THE PROCEDURE IN THE SERVICE MANUAL, SECTION 1B1, PAGE 11.

AFTER INSTALLATION CHECK OUTLET TEMPERATURES WITH THE SYSTEM PERFORMANCE CHART IN SECTION 1B OF THE SERVICE MANUAL.

PART AVAILABILITY:

PARTS ARE EXPECTED TO BE AVAILABLE ON 4/4/94.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE: LABOR OPERATION: D0447 USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 0

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.