S10/T10 P/U 4WD V6-173 2.8L (1986)
NOTE:
ALWAYS ENSURE THAT THE BRAKE SYSTEM IS OPERATIONAL AFTER PERFORMING BRAKE WORK BEFORE RETURNING
THE VEHICLE TO THE CUSTOMER.
PARTS LIST
Power Brake Kit
(1)
15602668
Kit consists of
Fitting
14102142
Pipe Assembly
10069245
Hose Assembly
15602667
Booster Assembly
18014642
Check Valve Kit
18012017
Adapter Plate
15602644
Seal
14030819
Instruction Sheet
15602669
Use T Op 7375 when performing these procedures. Labor times are as follows:
Check minimum idle speed,
1.0 hr.
Check TPS sensor numbers, Check TPS voltage and install power brake kit.
Add
If necessary to adjust minimum
.1 hr.
idle
If necessary to install updated
.1 hr.
TPS sensor
Technical Service Bulletin # 87T685
Date: 870701
Brakes - Hard Pedal Feel
GMC NUMBER:
87-T-68
GROUP:
5 -Brakes
DATE:
July, 1987
CORPORATE
NUMBER:
765002
SUBJECT:
HARD BRAKE PEDAL FEEL
MODELS:
1986-87 S/T MODELS WITH 2.8L V6 ENGINES
A condition described as an intermittent hard brake pedal feel may be caused by reduced vacuum at the brake booster. A power brake kit has been
developed to resolve this concern. Before kit installation, the engine idle speed and Throttle Position Sensor (TPS) must be inspected and/or adjusted
according to the following procedure:
MINIMUM IDLE SPEED CHECK AND ADJUSTMENT
IMPORTANT:
The throttle stop screw used for regulating minimum idle speed is adjusted at the factory. The screw is covered with a plug to discourage unauthorized
adjustments.
Engine RPM must be checked with the engine at normal operating temperature.
1.
Remove air cleaner, adapter, and gaskets. Discard gaskets.
2.
Plug any vacuum line ports as required.