GMC K25 1990: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:ROTOR

NHTSA Campaign ID Number: 93V119000

Production Dates: 1986-04-01 - 1991-12-01

Manufacturers Involved: General Motors, LLC

Component: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:ROTOR

Potential Number Of Units Affected: 341364

Report Initiator: ODI ODI Report

SEVERE CORROSION DUE TO ROAD SALT AT THE JOINT OF THE STAMPED STEEL CENTER SECTION AND THE CAST OUTER SECTION CAN CAUSE THE SECTIONS TO SEPARATE.

SEPARATION OF THE ROTOR SECTIONS CAN CAUSE LOSS OFBRAKING ABILITY IN THE AFFECTED WHEEL. THIS COULD RESULT IN INCREASED STOPPINGDISTANCE AND/OR LOSS OF VEHICLE CONTROL AND AN ACCIDENT.

REPLACE THE FRONT BRAKE ROTORS WITH NEW ROTORS WITH A CORROSION PROTECTION COATING. HOWEVER, IF REPLACEMENT OF BRAKE LININGS ARE NECESSARY, IT WILL BE DONE AT OWNER'S EXPENSE SINCE BRAKE LININGS ARE NORMAL MAINTENANCE ITEMS.

SYSTEM: BRAKES; HYDRAULIC; DISK ROTORS.VEHICLE DESCRIPTION: LIGHT TRUCKS AND VANS SOLD OR REGISTERED IN THE FOLLOWINGSTATES: CT, IL, IN, MA, ME, MI, NH, NJ, NY, OH, PA, RI, VT, AND WI.NOTES: THE VEHICLES INVOLVED CAN BE IDENTIFIED BY THE FOLLOWING: THE 5THCHARACTER OF THE VEHICLE IDENTIFICATION NUMBER MUST BE A "K" OR "L", AND THESEVENTH CHARACTER MUST BE "3","4","5","6", OR "9".IF YOUR VEHICLE IS PRESENTED TO AN AUTHORIZED DEALER ON AN AGREED UPONSERVICE DATE, AND THE REMEDY IS NOT PROVIDED WITHIN A REASONABLE AMOUNT OF TIMEAND FREE OF CHARGE OR THE REMEDY DOES NOT CORRECT THE SAFETY-RELATED DEFECT ORNONCOMPLIANCE, PLEASE CONTACT YOUR NEAREST GMC TRUCK ZONE OFFICE. THE TELEPHONENUMBERS OF THE ZONE OFFICES ARE LISTED IN YOUR WARRANTY AND OWNER'S ASSISTANCEINFORMATION MANUALS. ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETYADMINISTRATION'S AUTO SAFETY HOTLINE AT 1-800-424-9393.