Recall - Linear EGR System Sticking Open/Closed: Overview
File In Section: 6E-Engine EmissionsBulletin No.: 96067(A) Revision
Date: June, 1997
SUBJECT:
96067(A) - SPECIAL POLICY ADJUSTMENT - LINEAR EXHAUST GAS
RECIRCULATION SYSTEM
MODELS:
1992-94 S/T, M/L, C TRUCKS EQUIPPED WITH 4.3L ENGINE L35 0R
LB4) AND LINEAR EXHAUST GAS RECIRCULATION VALVE (LEGR)
THIS BULLETIN CANCELS AND REPLACES SPECIAL POLICY BULLETIN 96067 ISSUED FEBRUARY, 1997.
THE SPECIAL POLICY HAS BEEN EXTENDED TO COVER 1992 S/T AND M/L TRUCKS EQUIPPED WITH 4.3L (L35) ENGINE. THIS REVISION ALSO CONTAINS CHANGES IN THE "SERVICE PROCEDURE" TO CLARIFY THAT ANY ADDITIONAL NECESSARY DIAGNOSIS AND REPAIRS THAT ARE NOT RELATED TO THE LEGR CONDITION ARE NOT COVERED BY THE SPECIAL POLICY. THE CUSTOMER SHOULD BE INFORMED THAT ANY FURTHER SERVICE THAT IS NOT COVERED BY NEW VEHICLE WARRANTY WILL NOT BE COVERED BY THIS POLICY. ALSO, THE "CLAIM INFORMATION" SECTION IS REVISED TO ADD LABOR OPERATION T-2209 FOR PERFORMING A SYSTEM CHECK WHEN DETERMINING THAT THE LEGR SYSTEM IS NOT INVOLVED WITH A CUSTOMER COMPLAINT. THE CUSTOMER SHOULD NOT SE CHARGED FOR THIS SYSTEM CHECK.
This Special Policy Adjustment applies only to those vehicles that are equipped with Linear Exhaust Gas Recirculation Valves. Some vehicle lines equipped with 4.3L engines in a given model year were built with and without Linear Exhaust Gas Recirculation Valves due to the emission control requirements of various combinations. There are too many variables to describe in this bulletin. The only sure method to determine If a certain vehicle is involved is to interrogate VISS (under the heading VEHICLE WARRANTIES) or GMC ServiceNet (referring to the VEHICLE WARRANTY COVERAGE) to see if this special policy applies. Both VISS and GMC ServiceNet will display the following message for involved vehicles - "LINEAR EGR VALVE SPCL POLICY # 96067".
Some customers of 1992-94 model year S/T, M/L and C trucks may experience Linear EGR valve sticking, or foreign material holding the valve open/closed. This will cause a DTC 32 to be set which may be accompanied by poor driveability conditions such as engine surge, engine knock, engine stall, rough idle, and/or hard starting.
CAUSE
Carbon deposits or foreign material affecting Linear EGR operation.
SPECIAL POLICY ADJUSTMENT
This special policy covers the condition described above for a period of seven years or 75,000 miles (120,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership.
The repairs will be made at no charge to the owner. This special policy applies ONLY to repairs requiring Linear EGR system servicing.
VEHICLES INVOLVED
Involved are certain 1992 - 1994 S/T, M/L and C trucks equipped with 4.3L engines built within the VIN breakpoints as shown.
NOTICE:
Dealers should confirm vehicle eligibility through VISS (Vehicle information Service System) or Service at GMC only) prior to beginning repairs covered by this policy. [Not all vehicles within the above breakpoints may be involved]
PARTS INFORMATION
Due to the low number of vehicles involved and the limited availability of these parts, dealers should not order these part numbers for use as shelf stock.
CUSTOMER NOTIFICATION
Customers will be notified of this special policy on their vehicles by General Motors (see copy of divisional customer letter(s) for 1992 model year vehicles included with this bulletin - new customer letters will not be sent for 1993 and 1994 model year vehicles).
CUSTOMER REIMBURSEMENT
Customer claims for reimbursement on previously paid repairs to service the LEGR system are to be submitted by March 1, 1998 (this time limitation may be longer depending on the law in some states, such as California, Connecticut, Virginia, and Wisconsin). Repairs must have occurred within seven years of the date the vehicle was originally placed in service, or 75,000 miles (120,000 km), whichever occurs first. Owners (and/or prior owners) must submit original documentation which reasonably confirms the amount of unreimbursed repair expense(s), a description of the repair, date of the repair, and the person or entity performing the repair. CUSTOMERS FROM THE STATES OF CALIFORNIA, CONNECTICUT, VIRGINIA, AND WISCONSIN MUST SUBMIT REQUESTS FOR REIMBURSEMENT DIRECTLY TO (CHEVROLET/GMC/OLDSMOBILE) PER INSTRUCTIONS IN THE OWNER LETTER.