For 1990-2009 cars

# INFORMATION ON AFTER MARKET ANTI-LOCK BRAKE SYS. PRODUCTS

********************************************************************** INFORMATION **********************************************************************

#### SUBJECT: AFTERMARKET ANTI-LOCK BRAKE SYSTEM PRODUCTS

#### MODELS: 1994 AND PRIOR PASSENGER CARS AND TRUCKS

THE BRAKE SYSTEM IS ONE OF THE MOST IMPORTANT FEATURES ON ANY PASSENGER VEHICLE.

SEVERAL PRODUCTS WHICH TAP INTO THE MASTER CYLINDER AND/OR BRAKE SYSTEM AND CLAIM TO IMPROVE BRAKE SYSTEM PERFORMANCE ARE BEING SOLD IN THE AFTERMARKET. SOME OF THESE PRODUCTS IMPLY PERFORMANCE SIMILAR TO NEW VEHICLE ANTI-LOCK BRAKE SYSTEMS.

HOWEVER, CONTRARY TO THEIR CLAIMS, ADD-ON SYSTEMS WHICH DEPLETE FLUID FROM THE MASTER CYLINDER ON BRAKE APPLY MAY ACTUALLY INCREASE A VEHICLE'S STOPPING DISTANCE. THIS MAY CAUSE THE VEHICLE TO FAIL TO COMPLY WITH FEDERAL MOTOR VEHICLE SAFETY STANDARD (FMVSS) 105. IF THIS HAPPENS, THE FACILITY WHICH ALTERED THE VEHICLE COULD BE LIABLE FOR RENDERING THE BRAKE SYSTEM "INOPERATIVE".

GM WOULD LIKE TO REMIND EACH DEALER OF THEIR LEGAL OBLIGATION WITH REGARD TO ANY ACTIONS WHICH MIGHT TAKE A VEHICLE OUT OF COMPLIANCE WITH FMVSS, AND TO STRESS THE NEED TO UNDERSTAND THE OPERATION OF ANY AFTERMARKET SYSTEM OFFERED TO YOUR CUSTOMERS.

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GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

COPYRIGHT 1994 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.