CAMPAIGN: EGR VACUUM SOURCE HOSES PLUGGED
Models Affected: 1983 Centurys Equipped with 3.0L (VIN E) Engines
General Motors has determined that certain 1983 Centurys equipped with 3.0L Federal/California V-6 engines may be emitting pollutants in excess of Federal/California Emission Standards. The EGR vacuum source hoses located in the emission harness connector at the EGR solenoid may be plugged and not allowing the EGR valve to operate, resulting in an increase of exhaust emissions.
To correct this conditon on these vehicles, dealers are to inspect the EGR vacuum supply hoses and clear the restriction as instructed in the Technical Procedure of this bulletin.
Vehicles Involved
Certain 1983 Centurys equipped with 3.0l V-6 (VIN E) engines with the following serial numbers:
Assembly Plant From To and Including
Doraville DD440311 DD454714
Dealers are to perform this recall campaign at no charge to the owners on affected vehicles, regardless of time, mileage or ownership, and are to correct all affected vehicles in dealer new and used car inventory prior to their sale.
Whenever a vehicle subject to this campaign is taken into your new or used car inventory, or it is in your dealership for service in the future, you should take the steps to be sure the Campaign correction has been made.
DEALER MATERIAL
If your dealership has vehicles involved in this campaign, you will receive the following items:
List of all vehicles involved in this campaign shipped to your dealership.
One campaign identification label for each vehicle
Involved vehicles have been identified by Vehicle Identification Number Computer Listings. Computer Listings contain the complete Vehicle Identification Number, Owner Name and Address Data, and are furnished to the involved dealers with the Campaign Bulletin. Owner name and address data furnished will enable dealers to follow up with owners involved in this campaign.
These listings may contain owner names and addresses obtained from State Motor Vehicle Registration Records. The use of such motor vehicle registration data for any other purpose is a violation of law in several states. Accordingly, you are urged to limit the use of this listing to the follow-up necessary to complete this campaign.
TRANSFER OF VEHICLE
If a vehicle has been transferred or sold to another location. please forward vehicle information for this vehicle to your Buick Zone Office for handling with the proper dealer.
OWNER NOTIFICATION
Owners of vehicles involved in this campaign will be notified by Buick Motor Division (See copy of owner letter included with this bulletin).
CHANGE OF OWNER INFORMATION
Dealers are to use the Dealer Communication System (D.C.S.) to provide Buick Motor Division with subsequent Buick Owner Information. By reporting a change of owner name or address of a vehicle in Campaign status over the D.C.S., the need to send in an S-866 Form for that vehicle is eliminated. Terminal input instructions are covered in the D.C.S. Manual under Section 9, Page 9-J01A and B.
TECHNICAL PROCEDURE
1. Raise vehicle hood and cover fender.
2. Inspect emission harness connector at the EGR solenoid. Refer to Figure 1.
a. If connector has two hoses, as shown, hoses must be checked for restrictions, proceed with step 3.
b. If connector has four hoses, no further action is required except to install a campaign identification label, proceed to step 8.
3. Remove air cleaner wing nut, lift air cleaner assembly off from carburetor and position toward front of vehicle to expose EGR valve solenoid. Refer to Figure 1.
4. Remove the emission harness connector from the EGR solenoid.
S. Insert an awl or small screwdriver into both solenoid hoses as shown to clear any restrictions. Refer to Figure 2. Be careful not to puncture wall of hoses.
6. Check to be sure that hoses are not plugged by blowing air through them. If required, repeat step 4. Reinstall harness connector on solenoid.
7. Reinstall air cleaner assembly, being sure all hoses are connected and the PCV valve is installed in the intake manifold.
8. Install acampaign identification label.
Each vehicle modified in accordance with the instructions outlined herein will require a campaign identification label. Each label provides a space to include the campaign number, the five (5) digit Dealer Code of the dealer performing the campaign service, and the date vehicle was campaigned. This information may be inserted with a typewriter or ballpoint pen. When installing label, clean the surface of the fan guard and apply the campaign label.
WARRANTY INFORMATION
Dealers are to submit each campaigned vehicle as a separate case on the one-line Warranty Document Form S-764. Dealers submitting warranty claims by teletype terminal are to transmit campaign completions as a separate case also.
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.
