HEATER COOLANT RESERVOIR LEAKING (REPLACE HEATER. Chevrolet Blazer

SUBJECT: HEATER COOLANT RESERVOIR LEAKING (REPLACE HEATER COOLANT RESERVOIR CAP AND CLAMP)

MODELS: 1997-98 CHEVROLET S-10 ELECTRIC TRUCK

CONDITION:

SOME OWNERS MAY COMMENT ABOUT COOLANT LEAKING ONTO THE GROUND AND/OR LACK OF FUEL-FIRED HEAT BELOW 4 DEGREES CELSIUS (40 DEGREES FAHRENHEIT).

CAUSE:

THE RUBBER CAP USED ON ONE OF THE FUEL-FIRED HEATER RESERVOIR PORTS MAY SPLIT, CAUSING A COOLANT LEAK.

CORRECTION:

REPLACE THE OLD CAP AND CLAMP WITH A NEW CAP AND CLAMP USING THE PART NUMBERS LISTED BELOW. USE THE FOLLOWING SERVICE PROCEDURE.

SERVICE PROCEDURE

1. REMOVE THE OLD CAP AND CLAMP.

2. INSTALL THE NEW CAP AND CLAMP (FIGURE 1).

PARTS INFORMATION:

P/N DESCRIPTION QTY 27004546 CAP 1 1648216 CLAMP 1

PARTS ARE EXPECTED TO BE AVAILABLE 7-1-98 FROM GMSPO.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION DESCRIPTION LABOR TIME J3255 CAP AND CLAMP - REPLACE 0.2 HR

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

FIGURES: 01 CAPTIONS: FIG 1 - INSTALLING CAP AND CLAMP ON HEATER COOLANT RESERVOIR ITEM 1-RESERVOIR CAP ITEM 2-RESERVOIR CAP CLAMP

Object Number: 336960 Size: SH

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.