SMU - SEC. 6/6E - REV. DTC P0122, DTC P0154 AND KNOCK. Chevrolet Blazer

SUBJECT: SERVICE MANUAL UPDATE - SECTION 6,6E - REVISED DTC PO122, DTC PO154 AND KNOCK SENSOR REPLACEMENT PROCEDURE

MODELS: 1996-97 CHEVROLET AND GMC S/T MODELS 1996-97 OLDSMOBILE BRAVADA WITH 4.3L ENGINE (VINS W, X - RPOS L35, LF6)

THIS BULLETIN REVISES DTC P0122, DTC P0154 AND THE KNOCK SENSOR REPLACEMENT PROCEDURE IN SECTIONS 6 AND 6E OF THE APPROPRIATE SERVICE MANUALS AS FOLLOWS:

DTC PO122 - CHANGE STEP 3 YES ANSWER TO"GO TO STEP 12" IN THE FOLLOWING SERVICE MANUALS: 1996 S/T TRUCK BOOK 2, PAGE 6E-449 1997 S/T TRUCK BOOK 2, PAGE 6-900

DTC PO154 - CHANGE ALL HO2S DIAGNOSTIC TABLE CALLOUTS TO "BANK 2 SENSOR 1" IN THE FOLLOWING SERVICE MANUAL: 1997 S/T TRUCK BOOK 2, PAGES 6-956 AND 6-957

ATTACH THE REVISED KNOCK SENSOR REPLACEMENT PROCEDURE TO THE FOLLOWING SERVICE MANUALS: 1996 S/T TRUCK BOOK 2, PAGES 6E-762, 763 1997 S/T TRUCK BOOK 2, PAGES 6-1220, 1221

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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.