Bleed the hydraulic system if air has entered the hydraulic system.

It may be necessary to bleed the hydraulic system at all four wheels if either of the following has occurred:

If a pipe is disconnected at one wheel, then only bleed that wheel.

If the master cylinder is ever removed, bleed the master cylinder before re-installing it on the vehicle. This will reduce the time required to bleed the hydraulic system.

NOTICE: Brake fluid will damage electrical connections and painted surfaces. Use shop cloths, suitable containers, and fender covers to prevent the brake fluid from contacting these areas. Always re-seal and wipe off brake fluid containers to prevent spills.

1. Fill the reservoirs of the master cylinder with Delco Supreme No. 11® Hydraulic Brake Fluid (GM P/N 1052535) or an equivalent DOT 3 motor vehicle brake fluid.

Maintain a sufficient level of fluid during the bleeding procedure.




2. If the master cylinder is suspected of having air in the bore, bleed the master cylinder before bleeding any caliper.

2.1.	Disconnect the forward brake pipe connection at the master cylinder.

2.2.	Allow the brake fluid to flow from the connector port.

2.3.	Re-connect the brake pipe but do not tighten the brake pipe.

2.4.	Slowly apply the brake pedal and allow the air to bleed from the loose fitting.

2.5.	Tighten the fitting before releasing the brake pedal.

2.6.	Wait 15 seconds.

2.7.	Repeat this sequence, including the 15-second wait, until all air has been purged from the bore.

2.8.	After all air has been removed from the forward connection, repeat this procedure for the rear pipe.




3. Bleed each wheel in the following sequence:




3.1.	Right rear.

3.2.	Left rear.

3.3.	Right front.

3.4.	Left front.

4. Attach a hose to the bleeder screw on the caliper.

Immerse the opposite end of the hose into a container that is partially filled with clean brake fluid.




5. Slowly apply the brake pedal one time and hold.



6. Loosen the bleeder screw to purge the air from the caliper.
7. Tighten the bleeder screw and slowly release the brake pedal.
8. Wait 15 seconds.
9. Repeat this sequence, including the 15-minute wait, until all air has been purged from the caliper.



10. Repeat the above sequence at each wheel until the brake system has been bled.
11. If necessary, repeat the bleeding procedure to correct either of these conditions:

•	Sponginess in the brake pedal.

•	Brake warning lamp is ON.