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: To help avoid personal injury due to poor braking, DO NOT tap into the vehicle's brake hydraulic system to operate a trailer brake system.
Caution: Remove all the air from the hydraulic brake system anytime the hydraulic brake system is opened for repair. The entire bleeding procedure must be followed. Failure to remove all the air in the hydraulic brake system will result in reduced braking performance and possible personal injury.
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.
Caution: To help avoid personal injury, due to a retained load on the brake modulator, the Gear Tension Relief function of the scan tool must be performed prior to removal of the ABS brake modulator assembly.
Notice: The following are general precautions which should be observed when servicing the antilock brake system, traction control system and/or other vehicle systems. Failure to observes these precautions may result in antilock brake system damage. Refer to the CAUTIONS and NOTICES in this section.
Notice: DOT 5 silicone brake fluid should never be used in the ABS Brake System. Excessive wear of brake components and other conditions can occur from using DOT 5 silicone brake fluid.
Notice: Do not touch the electrical connections and pins, or allow them to come in contact with brake fluid, as this will damage the EBCM.
Notice: Power steering fluid and brake fluid must not be mixed. If brake seals contact steering fluid or steering seals contact brake fluid, seal damage will result.
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 harness connector before performing electric welding
procedures. • Always and carefully note the routing, position, mounting and
location of the ABS wiring, connectors, clips, brackets, etc. The ABS components
are extremely sensitive to Electromagnetic Interference (EMI). Proper mounting
is critical when servicing ABS 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 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 EBCM 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 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 system
after the following replacement: • Check the entire ABS system after the replacement of the EBCM. • Check the entire ABS system after the replacement of the wheel
speed sensors. • Check the entire ABS system after the replacement of the wiring
harness. • Check the entire ABS system after work involving the ABS system.
