TSB 23-50-05B: Front Disc Brakes - Squeal

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File In Section: 05 - Brakes Bulletin No.: 00-05-23-003 Date: May, 2000 TECHNICAL Subject: Front Disc Brake Squeal (Install New Front Disc Brake Pads) Models: 2000 Chevrolet and GMC G30 Vans Built Prior to May 2, 2000 Condition Some customers may comment about a squealing type noise coming from the front brakes during a light to moderate brake apply and appears to be more prevalent at high ambient temperatures. Cause The squealing noise may be the result of a "slip/stick" condition between the front brake pads and rotors that could cause a high frequency vibration. Correction On vehicles built prior to May 2, 2000, this condition can be minimized by replacing the existing front brake pads with new pads contained in service kits, P/N's 18045156 & 18045157, that have a new lining material. Refer to the Disc Brakes sub-section in the appropriate Service Manual for replacement procedures. Important : Guidelines provided in Corporate Bulletin Number 23-50-05B must be followed to insure proper cleaning, lubricating and assembling of brake and related components. Parts Information Part Number Description 18045156 Front Brake Pad Kit, RPO R04 (Single Rear Wheel) 18045157 Front Brake Pad Kit, RPO R05 (Dual Rear Wheel) Parts are expected to be available from GMSPO, 5/22/00. Warranty Information For vehicles repaired under warranty, use: Labor Operation Description Time Labor H0042 Pads, Disc Brake- 1.0 hr R&R or Replace Disclaimer