CAMPAIGN:DIESEL ENGINES HIGH EMISSIONS
Model and Year: 1984 CHEVROLET MONTE CARLO, EL CAMINO MODELS EQUIPPED WITH RPO LF9 (5.7L V8) DIESEL ENGINE, LOW AND HIGH ALTITUDE
General Motors has determined that certain early built 1984 Chevrolet Monte Carlo and El Camino models equipped with RPO LF9 (5.7L V8 diesel engine) may have been built incorrectly and therefore may not comply with exhaust emission standards.
CONDITION
Vehicles involved may have been manufactured with one or more of the following (3) three conditions:
A. Monte Carlo or El Camino model with (RPO LF9) 5.7L V8 diesel engine, and Federal (NA5) emissions package. The wiring harness leads to the altitude advance diode were reversed.
B. Monte Carlo or El Camino model with (RPO LF9) 5.7L V8 and Federal (NA5) or High Altitude (NA6) emission package. The wiring harness cold advance diode was reversed.
C. Monte Carlo or El Camino model with (RPO LF9) 5.7L V8 diesel engine and the High Altitude (NA6) emission package. The vacuum harness hoses to the Vacuum Reducer Valve were reversed.
VEHICLES INVOLVED
Certain 1984 Chevrolet Monte Carlo and El Camino models equipped with RPO (LF9) 5.7L V8 diesel engine built from the start of production through the following vehicle identification numbers:
PLANT FROM THROUGH ----- ---- ------- Baltimore EB100002 EB103817 Arlington ER107113 ER124934
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. Any dealer not receiving a computer listing with the campaign bulletin was not shipped any involved vehicles.
OWNER NOTIFICATION
Owners will be notified of this campaign on their vehicles by Chevrolet Motor Division (see copy of Owner Letter included with this bulletin).
DEALER CAMPAIGN RESPONSIBILITY
Dealers are to service all vehicles subject to this campaign at no charge to owners, regardless of mileage, age of vehicle, or ownership, from this time forward.
Whenever a vehicle subject to this campaign is taken in your new or used vehicle inventory, or it is in your dealership for service in the future, you should take the steps necessary to be sure the campaign correction has been made before reselling or releasing the vehicle.
Owners of vehicles recently sold from your new vehicle inventory are to be contacted by the dealer, and arrangements made to make the required modification according to instructions contained in this bulletin.
SERVICE PROCEDURE
Correction A
Reverse the wire terminal leads in the engine harness connector to the altitude advance diode as follows:
1. Open hood.
2. Remove the altitude advance diode located on the engine wiring harness above the master cylinder. Refer to Figure 1.
3. With a small screwdriver, unlock the wire terminals from the engine wiring harness connector and remove the terminals from the connector.
4. Reverse the position of the two terminals and reinstall into the connector.
5. Reinstall the diode assembly on the engine wiring harness.
6. B and/or C must also be performed when required.
Correction B
Reverse the direction of the cold advance diode in the engine wiring harness. Locate the cold advance diode (spliced into the engine wiring harness) as follows:
1. Locate the altitude advance diode located above the master cylinder. Refer to Figure 1.
2. Follow the light green/black wires from the altitude advance diode into the wiring harness conduit (approximately 14") to the taped splice. Do not remove tape from splice.
3. At this point you should see silver/gray tape which covers the cold advance diode. The diode has a dark green wire and light green wire with a black tracer leading to it.
4. Cut the dark green and light green wires so about 1" of the green wire is left on each side of the cold advance diode leads.
5. The cold advance diode should be soldered back into the harness with its leads reversed. That is, the light green wire on the diode should be soldered to the dark green wiring harness lead and the dark green diode lead should be soldered to the light green harness lead. This procedure can also be performed with electrical wire crimp on splices, if available.
6. Using electrical tape, tape over both solder or crimp joints to insulate them.
7. Carefully tuck the diode and wires back into the engine wiring harness conduit.
Correction C
Reverse the vacuum hoses at the vacuum reducer valve.
1. Locate the vacuum reducer valve located to the right of the air intake crossover. Refer to Figure 2.
2. Disconnect the vacuum hose from the port on the single port side of the valve.
3. Remove the vacuum hose from the center port on the two port side of the vacuum reducer valve and connect it to the port on the single port side of the valve.
4. Reconnect the hose from step 3 to the center port on the two port side of the valve.
5. Install a campaign correction label on the radiator support and close the hood.
CLAIM INFORMATION
Submit a Product Campaign Claim with the information indicated below:
Parts Failed Parts Failure Labor Labor *Other Count Part No. Allowance Code Operation Hours Hours ----- ------- --------- ---- --------- ----- -----
00 V2266 .2 .1
DESCRIPTION: Inspect for A, B and C Condition. Condition previously corrected, no further action required.
Parts Failed Parts Failure Labor Labor *Other Count Part No. Allowance Code Operation Hours Hours ----- -------- --------- ---- --------- ----- ----- 00 V2265 .4 .1
DESCRIPTION: Inspect and correct Condition A, B or C when required according to the instructions outlined in this bulletin.
*Campaign Administrative Allowance.
Dealers will automatically receive the correct labor allowance based on the Labor Operation performed.
Refer to the Chevrolet Claims Processing Manual for details on Product Campaign claim submission.
CAMPAIGN IDENTIFICATION LABEL
Each vehicle modified in accordance with the instructions outlined in this Product Campaign Bulletin will require a "Campaign Identification Label". Each label provides a space to include the five digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or ballpoint pen.
Each "Campaign Identification Label" is to be located on the radiator core support in an area which will be visible when the vehicle is brought in for periodic servicing by the owner.
Apply "Campaign Identification Label" only on a clean dry surface.
ADMINISTRATIVE PROCEDURE
REFER TO THE CURRENT CHEVROLET SERVICE POLICIES AND PROCEDURES MANUAL AND CLAIMS PROCESSING MANUAL FOR CAMPAIGN HANDLING AND ADMINISTRATIVE PROCEDURES.
General Motors has determined that some early built 1984 Chevrolet Monte Carlo and El Camino models with V8 diesel engines may have been manufactured incorrectly and therefore may not comply with exhaust emission standards.
The vehicles involved may have been manufactured with one or two of three (3) different conditions which may cause the vehicle not to comply with exhaust emission standards.
To correct these conditions your dealer will make the necessary electrical system or vacuum system corrections to your vehicle. This service will be performed at no charge to you.
Instructions for making the correction(s) have been sent to your dealer. The labor time to perform this service is approximately ten minutes. Please allow additional time for your dealer to process your vehicle.
The enclosed Owner Reply Card identifies your vehicle. Presentation of this card to your dealer will assist in making the inspection to your vehicle in the shortest possible time. If you have sold or traded your vehicle, please let us know by completing the postage paid Owner Identification Reply Card and returning it to us so that we may update our records. Should your dealer not schedule a service date within a reasonable time, you should contact your nearest Chevrolet Zone Office either in person or by telephone for assistance. The locations and telephone numbers for zone offices are listed in your Warranty and Owner Assistance Information booklet.
If your dealer or General Motors are unable to remedy this condition within a reasonable time, you may wish to advise the Environmental Protection Agency, at the following address: Director, Manufacturers Operation Division (EN-340), United States Environmental Protection Agency, 401 M Street, S.W. Washington, D.C., 20460. To ensure your full protection under the emission warranty made applicable to your vehicle by Federal Law, and your right to participate in future recalls, it is recommended that you have your vehicle serviced as soon as possible. Failure to do so could legally be determined to be a lack of proper maintenance of your vehicle.
We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your continued satisfaction with our product.
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.
