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How to Replace a BCM in a 2000 Saturn LS

The Saturn L-Series was a family of mid-size sedans and station wagons that General Motors produced from 2000 to 2005. The LS model was a sedan with a four-cylinder, 2.2-liter engine. The 2000 Saturn LS had an anti-lock braking system as a standard feature, which includes a brake control module, or BCM. The BCM has a microprocessor that calculates the braking power for each wheel during an emergency stop. The BCM in a Saturn LS is a black box in the engine compartment near the dash on the drivers side that can be replaced in a few simple steps.

Instructions

1

Turn the ignition off. Clean the BCM and surrounding area with a shop cloth to prevent contamination of the ABS when you remove the BCM.

2

Detach the electrical connector from the BCM. Remove the four retaining bolts that attach the BCM to the brake pressure modulator valve with a socket wrench. Pull the BCM carefully away from the valve.

3

Clean the the valve with a shop cloth and denatured alcohol to prevent contamination of the new BCM. Mount the new BCM to the valve and align the electrical terminals for the BCM and the valve.

4

Install the four retaining bolts that fasten the BCM to the valve. Tighten the bolts to 27 inch-pounds with a torque wrench. Attach the electrical connector to the BCM.