HIGH TEMPERATURE GAUGE READINGS. GMC Truck GMC P RV/Van/Commercial Chassis 1996

SUBJECT: HIGH TEMPERATURE GAUGE READINGS (INSTALL NEW WATER PUMP)

MODELS: 1995 CHEVROLET AND GMC C/K, G, P TRUCKS WITH 5.0L V8, 5.7L V8 TBI ENGINES (VINS H, K-RPOS L03, L05)

1996 CHEVROLET AND GMC G, P TRUCKS WITH 5.7L V8 TBI ENGINES ONLY (VIN K - RPO L05)

CONDITION:

SOME OWNERS MAY EXPERIENCE HIGH TEMPERATURE GAUGE READINGS.

CAUSE:

INSUFFICIENT COOLANT FLOW FROM THE LEFT LEG OF THE WATER PUMP.

CORRECTION:

TO ELIMINATE ALL OTHER AREAS THAT MAY BE SUSPECT (SUCH AS COOLANT TEMPERATURE SENSORS, GAUGE CLUSTERS, AND ELECTRICAL CIRCUITS, ETC.) PERFORM ALL DIAGNOSTICS LISTED IN THE SERVICE MANUAL. TO AID IN DIAGNOSTICS, TECHNICIANS MAY WANT TO USE INSTRUMENT PANEL GAUGE TESTERS SUCH AS KENT-MOORE J-33431-C OR J-24538-B. IF THE OVERHEAT CONDITION PERSISTS, INSTALL A NEW WATER PUMP WHICH OPTIMIZES COOLANT FLOW FROM BOTH WATER PUMP LEGS.

PARTS INFORMATION:

REFER TO THE FOLLOWING PART NUMBER WHEN REPLACING A WATER PUMP FOR THIS CONDITION:

PART NUMBER DESCRIPTION 12532529 WATER PUMP

GMSPO AND THEIR PART SUPPLIERS ARE EXPERIENCING CRITICAL INVENTORY AVAILABILITY FOR THIS PART. WE ARE REQUESTING THAT ONLY IMMEDIATE CUSTOMER REQUIREMENTS (VEHICLE DOWN) SHOULD BE PLACED ON A CSO ORDER. PLEASE DO NOT ORDER PARTS FOR "SHELF" STOCK. GMSPO EXPECTS THIS AVAILABILITY SITUATION WILL IMPROVE BY SEPTEMBER 1996.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION: J-3480 LABOR TIME: 1995 C/K 0.8 HRS 1995/1996 G 1.4 HRS

FIGURES: 0 ATTACHMENTS: 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.