Suburban 1/2 Ton 2WD V8-350 5.7L (1986)
Technical Service Bulletin # 86C22
Date: 870601
Campaign - Carburetor Anti-Dieseling Solenoid
Number:
86C22
Section:
6E
Date:
June, 1987
Subject:
PRODUCT EMISSION CAMPAIGN 86C22
CARBURETOR ANTI-DIESELING SOLENOID CONNECTION
Model and Year:
1985-1986 CHEVROLET C/K 20 LIGHT DUTY MODEL TRUCKS EQUIPPED
WITH 5.7L GAS ENGINE (RPO LT9) HEAVY DUTY FEDERAL EMISSIONS (RPO H5D/NA5) AND 4-SPEED MANUAL
TRANSMISSION (RPO M20)
TO:
ALL CHEVROLET DEALERS
General Motors has detemined that the engine electrical harness pigtail was not connected to the anti-dieseling solenoid on the carburetor of Flint
production 1985-1986 Chevrolet C/K 20 models equipped with 5.7L gas engines, manual transmission and heavy duty federal emissions. Not connecting
the engine harness to this solenoid results in a curb idle speed of 600 rpm rather than the specified 800 rpm curb idle.
It is necessary to connect the existing engine electrical harness pigtail to the anti-dieseling solenoid to bring these vehicles into conformity.
Vehicles, Owner and Dealer Information
Involved are all 1985-1986 Chevrolet light duty model C/K 20 trucks equipped with 5.7L gas engines (RPO LT9) with heavy duty federal emissions
(H5D/NA5) and 4-speed manual transmissions (M20) within the following VIN breakpoints:
YEAR
PLANT
FROM
THROUGH
1985
Flint (Line 1)
FF350750
FF449562
Flint (Line 2)
FF136162
FF214514
1986
Flint (Line 1)
GF300943
GF402526
Flint (Line 2)
GF101663
GF174823
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.
VEHICLES INVOLVED
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 has no involved vehicles currently assigned.
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 into 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
correction according to instructions contained in this bulletin.
Service Procedure
