S15/T15 2WD Jimmy V6-262 4.3L (1991)
Throttle Cable/Linkage: All Technical Service Bulletins
A/T - No Transmission Downshift/80-85% Throttle
GMC NUMBER:
92-7A-44(A)
GROUP:
7A Automatic Transmission
DATE:
April, 1992
CORPORATE
NUMBER:
167106R
SUBJECT:
NO TRANSMISSION DOWNSHIFT AND/OR 80-85% THROTTLE (INSTALL - REVISED ACCELERATOR CABLE AND/OR PEDAL
ASSEMBLY)
MODELS:
1991-1992 S/T WITH 4.3L ENGINE, AUTOMATIC TRANSMISSION
THIS BULLETIN CANCELS AND REPLACES GMC TRUCK SERVICE BULLETIN 92-7A-44, DATED JANUARY 1992 TO CORRECT THE
VIN BREAKPOINTS; ALL COPIES OF 92-7A-A4 SHOULD BE DESTROYED.
GMC TRUCK RECOMMENDS THAT A COPY OF THIS BULLETIN ALSO BE FILED UNDER SECTION 6C-ENGINE FUEL.
Owners of some 1991 and 1992 S/T vehicles equipped with an automatic transmission and a 4.3L (LB4) engine may comment that their vehicle exhibits
some of the following symptoms:
-
Poor performance
-
Lack of power
-
Sluggishness
-
No downshift
Important
THE SYMPTOMS FEEL LIKE TRANSMISSION FAILURE (LACK OF RESPONSE) BUT TRANSMISSION REPLACEMENT IS NOT
NECESSARY.
These symptoms may be due to the accelerator cable being too long and/or the accelerator pedal having incorrect geometry. When one or both of these
conditions are present, full throttle is not achieved. To correct this condition, replacement of accelerator pedal and/or cable with revised units is
necessary for the 4.3L (LB4) engine.
VEHICLES INVOLVED Involved are certain S/T vehicles with 4.3L (LB4) engines and automatic transmissions built before the following VIN
Breakpoints:
FOR THE ACCELERATOR CABLE
Model
Model
Year
Plant
From
To
GMC
1991-92
Pontiac
SOP 91
1GKCS18ZON0504057
GMC
1991-92
Shreveport
SOP 91
1GCTS19Z1N8505990
GMC
1991-92
Moraine
SOP 91
1GKDT13Z8N2506457
FOR THE PEDAL/LEVER ASSEMBLY
Model
Model
Year
Plant
From
To
GMC
1991-92
Pontiac
SOP 91
1GTCS19Z0N0506093
GMC
1991-92
Shreveport
SOP 91
1GTDT19Z5N8509235
GMC
1991-92
Moraine
SOP 91
1GTDT19ZXN2506480
SERVICE PROCEDURE
1.
Before replacing the accelerator cable and/or pedal assembly, connect TECH 1 or similar testing device to get a throttle position sensor (TPS)
