Caution: Brake fluid may irritate eyes and skin. In case of contact, take the
following actions:
• Eye contact - rinse thoroughly with water. • Skin contact - rinse with soap and water. • If ingested - consult a physician immediately.
Caution: Certain components in the Antilock Brake System 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 in Antilock Brakes or Antilock Brakes (ABS) with Traction Control System (TCS) should be serviced.
Notice: Observe the following general precautions when servicing the Antilock
Brake System and/or other vehicle systems. Failure to observe these precautions
may result in Antilock Brake System damage.
• Unplug the EBCM/EBTCM harness connector before performing electric
welding procedures. • Always and carefully note the routing, position, mounting and
location of the ABS and/or TCS wiring, connectors, clips, brackets, etc. The
ABS and/or TCS components are extremely sensitive to Electromagnetic Interference
(EMI). Proper mounting is critical when servicing ABS/TCS components. • Do not use a quick charger for engine starting if the battery
is still connected to the vehicle's electrical system. Do not use a quick
charger for battery charging if the battery is still connected to the vehicle's
electrical system. Failure to observe this precaution may cause serious damage
to electrical components. Always disconnect the battery negative cable when
charging a battery. • Never disconnect the battery from the electrical system with the
engine running. • The ignition switch must be in the OFF position when disconnecting
the EBCM/EBTCM connector. • Do not hang the suspension components by the wheel speed sensor
cable. Cable damage may result. • Do not force the wheel speed sensors into place. Push the sensors
into place by hand only. • During painting work, the EBTCM may be subjected to a maximum
temperature 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 ABS/TCS are non-serviceable and must be
replaced as assemblies. Do not disassemble any component which is designated
as non-serviceable in this section. • Use only Delco Supreme 11 (GM 1052542) brake fluid or equivalent
DOT 3 brake fluid when filling the master cylinder. Do not use a container
which has been used for petroleum based fluid. Do not use 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. • Use a scan tool diagnostic tester to check the entire ABS/TCS
system after the following replacement: • Check the entire ABS/TCS system after the replacement of the Brake
Pressure Modulator Valve (BPMV). • Check the entire ABS/TCS system after the replacement of the EBCM/EBTCM. • Check the entire ABS/TCS system after the replacement of the wheel
speed sensors. • Check the entire ABS/TCS system after the replacement of the wiring
harness. • Check the entire ABS/TCS system after work involving the ABS/TCS
system.
Important:
• Replace all components included in repair kits used to service
this system. • Lubricate rubber parts with clean brake fluid to make assembly
easier. • It may be necessary to bleed all or part of the brake system if
any hydraulic component is removed or disconnected. The torque values specified
are for dry, unlubricated fasteners. • Perform service operations on a clean bench, free from all mineral
oil materials. • Use of tire sizes other than those recommended may result in a
reduction in the optimal performance of the antilock brake or traction control
systems.
