Vehicle Damage Warnings

CAUTION:
^ Certain components In the "Antilock" Brake System (ABS) are not intended to be serviced Individually. Attempting to remove or disconnect certain system components may result in personal injury and/or Improper system operation. Only those components with approved removal and Installation procedures should be serviced.

^ Avoid spilling brake fluid on any of the vehicle's painted surfaces, wiring, cables or electrical connectors. Brake fluid will damage paint and electrical connections. If any fluid is spilled on the vehicle, flush the area with water to lessen the damage.

^ Always use the correct fastener in the proper location. When you replace a fastener, use ONLY the exact part number for that application. General Motors will call out those fasteners that require a replacement after removal. General Motors will also call out the fasteners that require thread lockers or thread sealant. UNLESS OTHERWISE SPECIFIED, do not use supplemental coatings (paints, greases, or other corrosion inhibitors) on threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener torque and the joint clamping force, and may damage the fastener. When you install fasteners, use the correct tightening sequence and specifications. Following these instructions can help you avoid damage to parts and systems.

GENERAL PRECAUTIONS
The following are general precautions which should be observed when servicing the "Antilock" Brake System.
- Before performing electric welding procedures, unplug the Electronic Brake/Traction Control Module (EBCM/EBTCM) harness connector.
- Always carefully note the routing, position, mounting and location of ABS and TCS wiring, connectors, clips, brackets, etc. ABS and TCS components are extremely sensitive to electro-magnetic interference (EMI). Proper mounting is critical when servicing these components.
- Never disconnect the battery from the electrical system with the engine running.
- Never connect or disconnect the EBCM/EBTCM connector with the ignition switch in "RUN."
- Do not attempt to repair the Brake Pressure Modulator Valve (BPMV).
- Do not hang the suspension components by the wheel speed sensor cables: cable damage may result.
- Do not force the wheel speed sensors into place. The sensors are to be pushed in by hand only.
- During painting work, the EBCM/EBTCM may be subjected to a maximum of 95°C (203°F) for brief periods and a maximum of 85°C (184°F) for lengthy periods (about two hours).
- Many components of the "Antilock" brake system are non-serviceable and must be replaced as assemblies.
- When filling the master cylinder use only Supreme 11 or equivalent DOT 3 brake fluid. Do not use a container which has been used for petroleum based fluids or a container which is wet with water. Petroleum based fluids will cause swelling and distortion of rubber parts in the hydraulic brake system and water will mix with brake fluid, lowering the fluid boiling point. Keep all fluid containers capped to prevent contamination. When bleeding the brake system, follow the recommended manual and pressure bleeding procedures.
- After replacement of the Brake Pressure Modulator Valve (BPMV), EBCM/EBTCM, wheel speed sensors, wiring harness or other work involving the ABS system, the entire ABS system must be checked using the Scan Tool Diagnostic Tester.