K 2500 Truck 4WD V8-350 5.7L (1991)
Throttle Position Sensor: Recalls
Campaign - TPS Inspection/Replacement
GMC NUMBER: 916E14
GROUP: 6E Engine Emission
DATE: August, 1991
SUBJECT:
THROTTLE POSITION SENSOR
MODELS:
1991 C, K, R, V, P TRUCKS AND G-VANS
General Motors has determined that certain 1991 C, K, R, V, P trucks and G-Vans with 4.3L, 5.7L, or 7.4L fuel-injected gasoline engines, coupled with
the Hydra-Matic 4L80-E electronic transmission (MT1), may have a TPS that exhibits an intermittent low output voltage. This condition may cause no
upshift to 4th gear, no TCC, or harsh transmission shifts.
To correct this condition dealers will inspect, and if necessary, replace the TPS switch.
VEHICLES INVOLVED
Involved are certain 1991 C, K, R, V, P trucks and G-Vans with 4.3L, 5.7L, or 7.4L fuel-injected gasoline engines, coupled with the Hydra-Matic
4L80-E electronic transmission (MT1) built within the following VIN breakpoints:
Model
Make
Plant
From
Through
C/K
GMC
Pontiac East
SOP
ME534777
Oshawa
M1541745
Janesville
MJ519682
R/V
GMC
Flint
SOP
MF520807
P
GMC
Detroit
SOP
M3501970
G
GMC
Lordstown
SOP
M7512706
Scarborough
M4512352
The specific vehicles involved in this campaign have been identified by Vehicle Identification Number Computer Listings. These listings are furnished to
all involved dealers with the campaign 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. Dealers are to correct all affected vehicles in new and used vehicle stock prior to their sale.
Whenever a vehicle subject to this campaign is taken into your new or used vehicle inventory, or it is in your dealership for service in the future, you
should take the steps necessary to ensure 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. If the name and address of the owner of an involved vehicle was unavailable to GMC
Truck Division at the time of campaign initiation, the dealer must determine the owner's name and address from the dealership sales records. Please
provide this information directly on the second copy of the listing next to the applicable VIN so that our records may be updated and the appropriate
notification mailed to the owner. This second copy should then be submitted to the address listed below in the previously supplied yellow campaign
envelopes.
GMC Truck Division
General Motors Corporation
101 Union Street
Plymouth, Michigan 48170
OWNER NOTIFICATION
Owners will be notified of this campaign on their vehicles by GMC Truck Division (see copy of owner letter included with this bulletin). A listing of
owner names and addresses has been furnished to the involved dealers to enable dealers to follow up with owners involved in this campaign. This listing
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 this campaign.
SERVICE INFORMATION