S10/T10 Blazer 4WD V6-262 4.3L (1989)
Brake Light Switch: All Technical Service Bulletins
Brakes - Light Dragging, Switch Adjustment
GMC NUMBER:
89-T-65
GROUP:
5 - Brakes
DATE:
May, 1989
CORPORATE
NUMBER:
915002R
SUBJECT:
LIGHT BRAKE DRAG-STAYS APPLIED-BRAKE SWITCH ADJUSTMENT
MODELS:
1989 S/T TRUCKS
Some vehicles may experience a condition of light brake drag while driving. These conditions have been found to be more noticeable on vehicles which
have an anti-lock brake system. This may be caused by improper brake switch adjustment. If the brake switch is not adjusted properly, the switch may
push on the brake pedal and cause the brake to remain partially applied. If a vehicle exhibits any of the above conditions, perform the following
functional brake switch adjustment check:
The following steps should be used to check brake switch adjustment:
Service Procedure:
1.
Depress the brake pedal and press the switch in until it is firmly seated in the clip.
^
Audible "clicks" can be heard as the threaded portion of the switch is pushed through the clip.
2.
Pull the brake pedal against the pedal stop until the audible "click" can no longer be heard.
For stop lamp switch adjustments on vehicles repaired under warranty use:
Labor Op:
T7945
Labor Time:
.2Hr
