DTC 32(REPL. LEGR VALVE & BASE GASKET, REPAIR COWL BURN THRU). GMC Truck Jimmy

********************************************************************** SUBJECT: DIAGNOSTIC TROUBLE CODE 32 (REPLACE LEGR VALVE AND BASE GASKET, REPAIR COWL BURN THROUGH)

MODELS: 1992-93 M/L VANS AND S/T TRUCKS (EQUIPPED WITH 4.3L (L35) ENGINE) ********************************************************************** CONDITION: SOME OWNERS MAY EXPERIENCE DIAGNOSTIC TROUBLE CODE (DTC) 32 AND LINEAR EXHAUST GAS RECIRCULATION (LEGR) VALVE FAILURE. THE VEHICLE MAY HAVE A ROUGH IDLE OR LACK OF POWER (VALVE FAILED OPEN), OR DETONATION (VALVE FAILED CLOSED).

CAUSE:

WATER INTRUSION INTO THE LEGR VALVE COIL HOUSING. THE VALVE CORRODES INTERNALLY, CAUSING THE PINTLE TO STICK. A STUCK PINTLE WILL CAUSE A DTC 32 TO BE SET BECAUSE THE ACTUAL LEGR PINTLE POSITION WILL NOT BE WITHIN 20 PERCENT OF THE DESIRED LEGR PINTLE POSITION.

CORRECTION:

M/L VAN ------- REPLACE THE FAILED LEGR VALVE WITH P/N 17093134 AND LEGR BASE GASKET 3522442. FOR M/L VANS BUILT BEFORE FEBRUARY 1993, INSPECT THE COWL AREA FOR SPOT WELD BURN-THROUGH (SEE ATTACHED DIAGRAMS). IF BURN- THROUGH IS FOUND, REPAIR WITH BODY PUTTY.

S/T TRUCKS ---------- REPLACE THE FAILED LEGR VALVE WITH P/N 17093134 AND LEGR BASE GASKET 3522442.

THE LATEST LEGR VALVE HAS AN RTV SEAL ADDED TO THE CAP AND HOUSING CRIMP AREA TO PREVENT WATER INTRUSION INTO THE VALVE COIL HOUSING.

PARTS INFORMATION:

LINEAR EXHAUST GAS RECIRCULATION VALVE 17093134 EXHAUST GAS RECIRCULATION VALVE BASE GASKET 3522442

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

WARRANTY INFORMATION:

LABOR OPERATION: J6270 - VALVE, EGR--REPLACE USE PUBLISHED LABOR OPERATION TIME. ADD: INSPECT AND REPAIR COWL (M/L VAN ONLY) 0.1 HOUR

FIGURES: 1

Object Number: 81194 Size: FS

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.