Safari Van 2WD V6-4.3L VIN X (2003)
17.1.
Inspect the brake system for external leaks.
17.2.
Pressure bleed the hydraulic brake system in order to purge any air that may still be trapped in the system.
18. Turn the ignition key ON, with the engine OFF. Check to see if the brake system warning lamp remains illuminated.
19. If the brake system warning lamp remains illuminated, the hydraulic brake pressure differential switch plunger may have be forced out of position
during the bleeding procedure and may need to be reset. Perform the following steps to reset the switch.
19.1.
Install a proper box-end wrench onto the RIGHT REAR wheel hydraulic circuit bleeder valve, then install a transparent hose over the end
of the bleeder valve.
19.2.
Submerge the open end of the transparent hose into a transparent container partially filled with Delco Supreme II - GM P/N 12377967
(Canadian P/N 992667) or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container.
19.3.
With the ignition key still ON, with the engine OFF, loosen the bleeder valve.
19.4.
Have an assistant slowly depress the brake pedal until the brake system warning lamp turns OFF and maintain pedal position while you
tighten the bleeder valve.
19.5.
Have the assistant slowly release the brake pedal.
20. If the brake system warning lamp continues to remain illuminated, DO NOT allow the vehicle to be driven until it is diagnosed and repaired.
Hydraulic Brake System Bleeding-Pressure
Hydraulic Brake System Bleeding (Pressure)
Tools Required
-
J 29532 Diaphragm Type Brake Pressure Bleeder, or equivalent
-
J 29567 Brake Pressure Bleeder Adapter
-
J 39177Combination Valve Pressure Bleeding Tool, or equivalent
-
J 41618 Brake Bleeder Adapter Set
Notice:
When adding fluid to the brake master cylinder reservoir, use only Delco Supreme II, GM P/N 12377967 (Canadian P/N 992667), or
equivalent DOT-3 brake fluid from a clean, sealed brake fluid container. The use of any type of fluid other than the recommended type of
brake fluid, may cause contamination which could result in damage to the internal rubber seals and/or rubber linings of hydraulic brake
system components.
Notice:
Refer to Brake Fluid Effects on Paint and Electrical Components Notice, refer to Service Precautions.
See: Brakes and Traction Control/Service Precautions/Vehicle Damage Warnings/Brake Fluid Effects on Paint and Electrical Components
Notice
1. Place a clean shop cloth beneath the brake master cylinder to prevent brake fluid spills.
2. With the ignition OFF and the brakes cool, apply the brakes 3-5 times, or until the brake pedal becomes firm, in order to deplete the brake booster
power reserve.
3. If you have performed a brake master cylinder bench bleeding on this vehicle, or if you disconnected the brake pipes from the master cylinder, you
must perform the following steps:
3.1.
Ensure that the brake master cylinder reservoir is full to the maximum-fill level. If necessary add Delco Supreme II (GM P/N 12377967) or
equivalent DOT-3 brake fluid from a clean, sealed brake fluid container. Clean the outside of the reservoir on and around the reservoir cap
prior to removing the cap and diaphragm, if cap removal is necessary.
3.2.
With the rear brake pipe installed securely to the master cylinder, loosen and separate the front brake pipe from the front port of the brake
master cylinder.
3.3.
Allow a small amount of brake fluid to gravity bleed from the open port of the master cylinder.
3.4.
Reconnect the brake pipe to the master cylinder port and tighten securely.
3.5.
Have an assistant slowly depress the brake pedal fully and maintain steady pressure on the pedal.
3.6.
Loosen the same brake pipe to purge air from the open port of the master cylinder.
3.7.
Tighten the brake pipe, then have the assistant slowly release the brake pedal.
3.8.
Wait 15 seconds, then repeat steps 3.-3.7 until all air is purged from the same port of the master cylinder.
3.9.
With the front brake pipe installed securely to the master cylinder, (after all air has been purged from the front port of the master cylinder),
loosen and separate the rear brake pipe from the master cylinder, then repeat steps 3.3-3.8.
3.10.
After completing the final master cylinder port bleeding procedure, ensure that both of the brake pipe-to-master cylinder fittings are
properly tightened.
4. Fill the brake master cylinder reservoir to the maximum-fill level with Delco Supreme II (GM P/N 12377967) or equivalent DOT-3 brake fluid
from a clean, sealed brake fluid container. Clean the outside of the reservoir on and around the reservoir cap prior to removing the cap and
diaphragm.
5. Remove the cap from the metering valve end of the combination valve, then install the J39177, or equivalent to the metering valve.
6. Using the J39177, depress the shaft of the metering valve to maintain the proper flow of brake fluid to the front wheel hydraulic circuit during the
pressure bleeding procedure.
7. Assemble the J 41613 to the J 29567.
8. Install the J 41618 and J 29567 to the brake master cylinder reservoir.
9. Check the brake fluid level in the J 29532, or equivalent. Add Delco Supreme II (GM P/N 12377967) or equivalent DOT-3 brake fluid from a
