S10/T10 Blazer 2WD V6-262 4.3L VIN W CPI (1992)
Throttle Cable/Linkage: Technical Service Bulletins
A/T - No Transmission Downshift/80-85% Throttle
Number:
92-84A-7A
Section:
7A & 6C
Date:
MARCH 1992
Corporate Bulletin No.: 167106R
ASE No.: A1, A2, A8
Subject:
NO TRANSMISSION DOWNSHIFT AND/OR 80-85% THROTTLE
Model and Year:
1991-92 S/T TRUCKS WITH 4.3L ENGINE AND AUTOMATIC TRANSMISSION
THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN NO. 92-84-7A DATED FEBRUARY, 1992. THE VIN
BREAKPOINTS HAVE BEEN REVISED. ALL COPIES OF 92-84-7A SHOULD BE DISCARDED.
Owners of some 1991 and 1992 S/T vehicles equipped with an automatc 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 YEAR
PLANT
FROM
TO
1991-92
Pontiac
SOP 91
1GNCS18Z7N0110865
1991-92
Shreveport
SOP 91
1GCCS19ZXN8127815
1991-92
Moraine
SOP 91
1GCCS19Z7N2122624
FOR THE PEDAL/LEVER ASSEMBLY
MODEL YEAR
PLANT
FROM
TO
1991-92
Pontiac
SOP 91
1GNCS18Z4NO119040
1991-92
Shreveport
SOP 91
1GCCS14Z0N8144551
1991-92
Moraine
SOP 91
IGNDT13Z0N2121994
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)