SMU - SECTION 6E2, 6E3 - DRIVABILITY & EMISSIONS

SUBJECT: SERVICE MANUAL UPDATE - SECTION 6E2, 6E3 - DRIVEABILITY AND EMISSIONS - CHART A-1 - NO MALFUNCTION INDICATOR LAMP (MIC) "SERVICE ENGINE SOON"

MODELS: 1987-94 PASSENGER CARS AND U VAN WITH 60-DEGREE V-6 ENGINE EXCEPT DOHC 3.4L (VIN X - RPO LQ1)

WHEN FOLLOWING CHART A-1, IT IS NECESSARY TO USE A 10 AMP FUSE JUMPER WHEN PROVIDING A GROUND ON THE MALFUNCTION INDICATOR LAMP DRIVER CIRCUIT TO ILLUMINATE THE (MIL), INSTEAD OF A TEST LIGHT. USING A TEST LIGHT MAY CAUSE BOTH THE MIL AND TEST LIGHT TO ILLUMINATE, THE MIL TO ILLUMINATE DIM OR THE MIL NOT TO ILLUMINATE AT ALL.

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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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