INFO. ON CRANK POSITION SENSOR INSTALLATION. GMC Truck Sonoma Pickup

SUBJECT: INFORMATION ON CRANK POSITION SENSOR INSTALLATION

MODELS: 1995 CHEVROLET AND GMC TRUCK S/T TRUCKS WITH 4.3L ENGINE (VIN W - RPO L35)

THE CRANK POSITION SENSOR MUST BE **FULLY SEATED** AND HELD PRIOR TO TIGHTENING THE HOLD DOWN BRACKET BOLT (SEE FIGURE 1). TORQUE THE HOLD DOWN BRACKET BOLT TO 8 - 9 N.M (5.9 - 6.6 LBS. FT.). **USE HAND TOOLS ONLY--DO NOT EXCEED THE TORQUE SPECIFICATION.**

A SENSOR WHICH IS COCKED AND/OR LOOSE IN THE FRONT COVER BORE MAY CAUSE THE HOLDING BRACKET TO BEND AND/OR LEAD TO SETTING THE FOLLOWING DTCS:

DTC DESCRIPTION

P0300 RANDOM MISFIRE DETECTION P0301 - P0306 CYLINDER MISFIRE DETECTION P0337 CRANKSHAFT POSITION SENSOR CIRCUIT - LOW DUTY CYCLE INPUT P1345 CAMSHAFT POSITION SENSOR MISINSTALLED

NOTE: MISFIRE DETECTION MAY ONLY OCCUR ABOVE 2400 ENGINE RPM IN THIS INSTANCE.

IF THESE CODES ARE DETECTED, CHECK THE CRANK POSITION SENSOR FOR PROPER SEATING.

FIGURES: 1

Object Number: 93613 Size: MF

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.