SMU - SECTION -4- LIFT PUMP PRESSURE SPECIFICATION CHANGE. GMC Truck GMC Suburban

SUBJECT: SERVICE MANUAL UPDATE-SECTION 4-LIFT PUMP PRESSURE SPECIFICATION CHANGE

MODELS: 1994 CHEVROLET AND GMC TRUCK C/K, G AND P TRUCKS WITH 6.5L DIESEL ENGINES (VINS F, P, S - RPOS L65, L49, L56)

THIS INFORMATION REPLACES THAT FOUND ON PAGE 4-10 IN SECTION 4 OF BOTH SERVICE MANUALS.

LIFT PUMP PRESSURE CHECK STEP 3 SHOULD READ:

3. IDLE ENGINE AND MEASURE FUEL PRESSURE.

* IF PRESSURE IS AT LEAST 27 KPA (4 PSI) GO TO STEP 4.

* IF PRESSURE IS LESS THAN 27 KPA (4 PSI) REFER TO CHART A-5 IN SECTION 3 BEFORE REPLACING LIFT PUMP.

FIGURES: 00 ATTACHMENTS: 00

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.