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 driver's side that can be replaced in a few simple steps.

Things You'll Need

• Socket wrench set
• Shop cloth
• Denatured alcohol
• Torque wrench

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.

References

• AutoZone: 2000 Saturn LS Brake Controller