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How to Replace the ABS Module on a 98 Chevy Z71

The fourth generation of the Chevrolet C/K series of full-size pickup trucks was in production from 1987 to 1998. The Z71 off-road package for these vehicles included skid plates and improved shock absorbers. The anti-lock braking system, or ABS, for the 1998 Chevrolet C/K series required a module to control the braking power to each wheel during an emergency stop. The Z71 package did not affect the procedure for replacing the ABS module.

Instructions

1

Record the position of the electrical connectors and brake lines on the ABS module so you can attach them correctly later. The ABS module is in the engine compartment on the left side of the engine. It is a small box-like component that has brake lines connected to it.

2

Detach the electrical connectors from the ABS module. Remove the retaining bolts from the brake lines with a socket wrench, and disconnect the brake lines from the ABS module.

3

Disconnect the bolts from the ABS mounting module bracket with a socket wrench. Detach the bracket from the vehicle with the ABS module still attached. Remove the retaining bolts from the ABS module, and separate the ABS module from its mounting bracket.

4

Mount the new ABS module to its mounting bracket, and tighten the bolts to 5 foot-pounds with a torque wrench. Connect the bracket to the vehicle, and tighten its mounting bolts to 33 foot-pounds.

5

Attach the brake lines to their original fittings, and tighten the fittings to 16 foot-pounds with a torque wrench. Attach the electrical connectors to their original positions on the ABS module.

6

Bleed the ABS braking system, then bleed the regular braking system.

Posted by Unknown at 10:15 AM

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