K 1500 Suburban 4WD V8-393 6.5L DSL Turbo (1994)
Technical Service Bulletin # 94C57A
Date: 941201
Campaign - Poor Throttle Response/Stalling/Long Cranking
GMC NUMBER: 94C57A
GROUP: 6A Engine Mechanical
DATE: December 1994
SUBJECT:
POOR THROTTLE RESPONSE, STALLING, MISFIRE, POOR COLD OR HOT START, EXTENDED CRANK HOT, START THEN STALL HOT
MODELS:
1994 GMC C/K TRUCKS AND G VANS WITH 6.5L DIESEL ENGINE (RPO'S L65, L56 AND L49 WITH AUTOMATIC AND/OR MANUAL
TRANSMISSION)
THIS BULLETIN CANCELS AND REPLACES 94-C-57 ISSUED OCTOBER 1994. DESTROY ALL COPIES OF 94-C-57, REVISIONS HAVE
BEEN MADE TO THE SERVICE PROCEDURES, WARRANTY INFORMATION, AND THE TIMING PROCEDURE.
General Motors has determined that CERTAIN 1994 GMC C/K trucks and G vans may experience poor throttle response, stalling, misfire, poor cold or
hot starting, extended cranking of the starter with a hot engine, and/or your vehicle will start and then stall when the engine is hot. Vehicles with manual
transmissions may also experience deceleration stall and poor acceleration performance.
^
Poor cold starting includes an extended crank time (more than 4 seconds at temperatures of 0 degrees Fahrenheit and above), rough idle, white smoke
and/or start then stall. A cold start is defined as starting the engine after shut down for more than three hours.
^
No start or extended cranking of the starter with a hot engine, starting then stalling when the engine is hot, is defined as starting the engine within
three hours of shutdown (extended cranking time with a hot engine is defined as more than 4 seconds cranking time).
To correct these condition, involved vehicles will be updated with a service parts kit and a PCM PROM.
VEHICLES INVOLVED
Involved are CERTAIN 1994 GMC C/K trucks and G vans built within the VIN breakpoints as shown.
The specific vehicles involved in this campaign have been identified by Vehicle Identification Number (VIN) Computer Listings. These listings are
furnished to all involved dealers with the campaign bulletin. Dealers should confirm vehicle eligibility through VISS (Vehicle Information Service
System) or SERVICENET prior to beginning campaign repairs.
DEALER CAMPAIGN RESPONSIBILITY
All unsold vehicles in dealers' possession and subject to this campaign MUST be held and inspected/repaired per the service procedure of this campaign
bulletin BEFORE owners take possession of these vehicles.
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.
Owners of vehicles recently sold from your vehicle inventory are to be contacted by the dealer and arrangements made to make the required correction
according to instructions contained in this bulletin.
In summary, whenever a vehicle subject to this campaign enters your vehicle inventory, or is in your dealership for service in the future. please take the
steps necessary to be sure the campaign correction has been made before selling or releasing the vehicle.
If the name and address of the owner of an involved vehicle was unavailable to GMC Thick Division at the time of campaign initiation, the dealer must
