INFO. ON SERVICEABILITY OF INSTRUMENT CLUSTER GAUGES

SUBJECT: INFORMATION ON SERVICEABILITY OF INSTRUMENT CLUSTER PARTS

MODELS: 1990-94 TOPKICK/KODIAK, 1990-94 CHEVROLET + GMC TRUCK P6 AND B7 MODELS

SOME DEALERS CONTINUE TO RETURN FAILED INSTRUMENT CLUSTER ASSEMBLIES TO AC DELCO FOR SERVICE, WHICH MAY TAKE SEVERAL DAYS AND COULD LEAD TO A DISSATISFIED CUSTOMER. IN ORDER TO EXPEDITE SOME INSTRUMENT CLUSTER REPAIRS, GM SPO HAS RELEASED SEVERAL OF THE GAUGES INDIVIDUALLY. THIS MEANS THAT THE INSTRUMENT CLUSTER MAY BE SERVICED AT YOUR DEALERSHIP, DEPENDING ON THE REPAIR REQUIRED. REFER TO SERVICE MANUAL SECTIONS, 8A AND 8C.

THE SPECIFIC GAUGE PART NUMBERS FOR THE B7 AND P6 MODELS ARE LISTED UNDER GROUP 9 OF THE GM SPO PARTS FICHE OR CATALOG. FOR THE TOPKICK AND KODIAK, THERE ARE FOUR 1990- 1994 C6, C7 CLUSTER ASSEMBLIES/INSTRUMENT PANELS IDENTIFIED IN GROUP 9 OF THE GM SPO PARTS FICHE OR CATALOG. THESE CLUSTERS ARE IDENTIFIED BY THE SPECIFIC BRAKE AND GAUGE OPTIONS ORDERED ON THE TRUCK:

- HYDRAULIC BRAKES JE3, TACHOMETER U16 AND TACHOMETER AND ENGINE ALARM UER - AIR BRAKES JE4, EXCLUDING TACHOMETER U16 AND TACHOMETER AND ENGINE ALARM UER - HYDRAULIC BRAKES JE3, EXCLUDING TACHOMETER U16 AND TACHOMETER AND ENGINE ALARM UER - AIR BRAKES JE4, TACHOMETER U16 AND TACHOMETER AND ENGINE ALARM UER

FIGURE 1 SHOWS AN EXPLODED VIEW OF AN INSTRUMENT CLUSTER ASSEMBLY WITH THE VARIOUS GAUGES IDENTIFIED, DEPENDING ON THE OPTIONS U16 AND UER. PARTS THAT ARE SERVICEABLE ARE:

1. ODOMETER 2. SPEEDOMETER WITH VOLTMETER AND FUEL GAUGE (WITH U16 AND UER) (LH HALF OF CLUSTER) 2. SPEEDOMETER WITH VOLTMETER (WITHOUT U16 AND UER) (LH HALF OF CLUSTER) 3. AIR BRAKE PRESSURE GAUGE (JE4) 4. FUEL, TEMPERATURE, AND OIL PRESSURE GAUGE (WITHOUT U16 AND UER) (RH HALF OF CLUSTER) 4. TACHOMETER WITH OIL AND TEMPERATURE GAUGE (WITH U16 AND UER) (RH HALF OF CLUSTER) 5. "CHECK GAUGES" CIRCUIT BOARD ASSEMBLY

OTHER CLUSTER PARTS SUCH AS CIRCUIT BOARDS, RETAINERS, LENS, BULBS, ARE ALSO AVAILABLE SEPARATELY, AND ARE LISTED WITHIN GROUP 9.

SERVICE PROCEDURES FOR REPLACING INSTRUMENT CLUSTER PARTS:

REFER TO THE SERVICE MANUAL SECTIONS 8A INSTRUMENT PANEL AND GAGES AND 8C ELECTRICAL DIAGRAMS AND DIAGNOSIS. ON TRUCKS EQUIPPED WITH JE4 AIR BRAKES, DISCHARGE THE AIR FROM THE TANKS BEFORE REMOVING THE INSTRUMENT CLUSTER.

COMPLETE REMOVAL OF THE INSTRUMENT CLUSTER WHEN SERVICING GAGES IS RECOMMENDED.

FOR CLUSTER SERVICE PROCEDURES AND ADDITIONAL PARTS INFORMATION, REFER TO BULLETIN 168304 (GMC TRUCK 92-8C-53A).

SERVICE PARTS INFORMATION:

REFER TO GROUP 9 OF THE GMSPO PARTS FICHE OR CATALOG FOR SPECIFIC PART NUMBERS.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OP DESCRIPTION LABOR TIME

N4775 REPLACE LH GAUGE CLUSTER N4770 REPLACE RH GAUGE CLUSTER USE N4610 REPLACE AIR PRESSURE GAGE PUBLISHED N4640 REPLACE ENGINE COOLANT TEMPERATURE GAUGE LABOR OPERATION N4680 REPLACE FUEL GAGE TIME N4760 REPLACE VOLTMETER

IMPORTANT: THESE LABOR OPERATIONS INCLUDE REMOVING AND REPLACING THE INSTRUMENT PANEL CLUSTER ASSEMBLY AS WELL AS THE INDIVIDUAL GAGE LISTED.

FIGURES: 1

CAPTIONS: FIGURE 1 - EXPLODED VIEW OF AN INSTRUMENT CLUSTER ASSEMBLY

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.

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