K 2500 Suburban 4WD V8-454 7.4L VIN N TBI (1995)
Cruise Control Module: Customer Interest
Stepper Motor Cruise Control - Will Not Resume/Reset
FILE IN SECTION: 9 - Accessories
BULLETIN NO.: 56-90-02A
DATE: July, 1995
SUBJECT:
Stepper Motor Cruise Control will not Resume or Reset (Replace SMCC Module)
MODELS:
1993-95
Chevrolet Camaro
1993-95
Pontiac Firebird
with 3.4L V6 Engine (VIN S - RPO L32) and Automatic Transmission (M30) only
OR
with 5.7L V8 Engine (VIN P - RPO LT1) and any Transmission
1994-95
Chevrolet and GMC Truck C/K, S/T, M/L Models
This bulletin is being revised to add F car information. Please discard Corporate Bulletin Number 56-90-02 (Section 9 - Accessories).
CONDITION
Some owners may comment that the Stepper Motor Cruise Control (SMCC) will intermittently cut out and will not resume or reset unless the ignition
key is cycled.
CAUSE
The SMCC is sensitive to any brake switch contact bounce of less than 32 milliseconds. This contact bounce may cause the SMCC to go into a
diagnostic shut down mode until the module is reset by turning the ignition off. For trucks, the 1994 Zero Adjust Brake switches tend to aggravate this
sensitivity.
CORRECTION
Replace the SMCC module only if the diagnosis in the Service Manual, Section 8A Cruise Control does not resolve the concern.
Service Procedure
For 1994-95 Chevrolet and GMC Truck C/K, S/T, M/L Models: Follow the SMCC MODULE remove and install procedure using the appropriate
service manual.
For F-car models, use the following procedure.
Remove
Before removing cruise control module, disconnect cruise control cable to obtain the necessary clearance.
1.
Disconnect cruise control cable end fitting from throttle body lever stud.
If vehicle is equipped with accelerator control/cruise control cable adjuster (throttle relaxer), remove cruise control cable end fitting from adjuster. Note
location of pulley for end fitting.
2.
Unlock cruise control cable conduit by pulling up on unlock button.
3.
Push conduit together to obtain the additional cable slack.
4.
Remove cruise control module per Section 9B of the Service Manual.
Important:
It is not necessary to remove cruise control cable from vehicle.
Install
1.
Install cruise control cable to cruise control module per Section 9B of the Service Manual,
