Brakes - Dual Rear Wheels Momentary Tire Chirp: Overview
90chevy21GMC NUMBER: 89-5E-132
GROUP: 5E Anti-Lock Brakes
DATE: May, 1990
CORPORATE
NUMBER: 065007R
SUBJECT: RWAL BRAKE SENSITIVITY
MODELS: 1988-89 C3, K3, WITH RPO R05 (DUAL REAR WHEELS)
THIS BULLETIN CANCELS AND REPLACES BULLETIN NUMBER 88-T-166 (CORPORATE NUMBER 865015) TO REVISE THE SERVICE PROCEDURE. ALL COPIES OF 88-T-166 SHOULD BE DISCARDED.
Some owners of 1988-89 C3 and K3 models equipped with dual rear wheels, may comment about a momentary rear tire "chirp" during brake application with the vehicle unloaded. A service procedure has been developed for this condition, consisting of replacing the rear wheel backing plate assemblies. The assemblies consist of the backing plates with all brake components mounted on them. With the replacement of the backing plates, the hub and drum assembly must also be replaced.