GM Full-Size Trucks 1980-1987 Repair Guide

ADJUSTMENT

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REAR DRUM BRAKES



These brakes are equipped with self-adjusters and no manual adjustment is necessary, except when brake linings are replaced.

FRONT DISC BRAKES



These brakes are self-adjusting and no adjustment is possible.

BRAKE PEDAL



Brake pedal adjustment is made by removing the cotter pin, nut and bolt from the pedal rod end and screwing the rod end in or out to achieve the proper pedal travel.

PEDAL TRAVEL



At reasonably frequent intervals, the brakes should be inspected for pedal travel, which is the distance the pedal moves toward the floor from a fully released position. Inspection should be made with the brake pedal firmly depressed (approximately 90 lbs.) while the brakes are cold.



Manual.......4.5 in. (115mm)
 
Power........3.5 in. (90mm)
 

On power brake equipped vehicles, pump the pedal a minimum of 3 times with the engine off before making pedal travel checks. This exhausts all vacuum from the power booster or fluid from the hydro-boost accumulator.

 
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