United States 79V101000
General Motors, LLC
The problem
AN INCORRECT FLUID WAS USED AS AN ASSEMBLY AID (LUBRICATION) DURING INSTALLATION OF THE PISTON SEAL IN FRONT BRAKE CALIPERS WHICH WERE INSTALLED IN 10.5" X 1" DISC BRAKE ASSEMBLIES USED ON "A" SERIES CARS. THE INCORRECT FLUID ATTACKS THE PISTON SEAL AND CAUSES THEM TO SWELL AND DETERIORATE.
What owners should do
DEALER WILL REPLACE THE BRAKE CALIPER PISTON SEALS.
Units 46