GMC Sonoma Auto Trans Brake Shift Interlock Solenoid Replacement Cost

Know what price you should pay to get your vehicle fixed.

The average cost for a GMC Sonoma auto trans brake shift interlock solenoid replacement is between $236 and $278. Labor costs are estimated between $158 and $200 while parts are priced at $78. Estimate does not include taxes and fees.
Note about price: The cost of this service or repair can vary by location, your vehicle's make and model, and even your engine type. Related repairs may also be needed. Talk with a RepairPal Certified shop to learn which repairs might be right for you.

How do Auto Trans Brake Shift Interlock Solenoids work?

The solenoid is actuated by two things. The brake light switch, which detects when the brakes are pressed, and the ignition switch or anti theft system. As a system, these three components work together to cause the brake shift interlock solenoid to remain in the locking position or move to allow the shifter to move. When the brake pedal is pressed and the key is on, you may hear a little thump or light metallic sound near the gear selector, and this is the solenoid moving so you can take the vehicle out of park. These solenoids are electronically actuated, and move by extending or retracting a push rod in a linear motion.

What are the symptoms of a bad Auto Trans Brake Shift Interlock Solenoid?

There are two possible symptoms that the brake shift interlock solenoid can have, but know that these symptoms may be intermittent or occur under different conditions. IF the solenoid fails to extend or retract, the result will be that the gear selector will be able to move freely at all times, or the gear selector will be stuck in park. This failure may be due to a faulty brake shift interlock solenoid, but there are other concerns.

Can I drive with a bad Auto Trans Brake Shift Interlock Solenoid?

Depending on the year make and model, failure of this solenoid is not an immediate concern except for convenience. It is in the best interest of the vehicle owner to have this repaired immediately as it is part of both the safety and anti theft systems of the vehicle, but there are ways of operating the vehicle regardless of the condition of this solenoid. However, if there is no manual override for the brake shift interlock solenoid it will need to be replaced before the vehicle can function.

How often do Auto Trans Brake Shift Interlock Solenoids need replacement?

These solenoids will fail on a fair amount of vehicles. The majority will never have a problem, and many others will be due to a brake light switch failure. For this reason, it is difficult to estimate how often the brake shift interlock solenoid will fail, but considering the amount of use this solenoid endures, failure around or after 100,000 miles would be no surprise.

How are Auto Trans Brake Shift Interlock Solenoids replaced?

Removal of the solenoid may involve removing a trim panel and a few fasteners, or it may require that the gear selector surround trim, console trim panel, and gear selector be removed for access. Once access is available, the solenoid will be removed from electrical connections, and linkages that are connected to the solenoid pushrod, and finally removed after disconnecting fasteners. Replacement is the reverse of removal, and the solenoid can be tested through normal operation of the gear selector and brake pedal.

RepairPal Recommendations for Auto Trans Brake Shift Interlock Solenoid issues

Even if the brake lights work, we recommend testing the brake light switch if the brake shift interlock solenoid is not receiving power. This is because the brake light switch may have a secondary or tertiary circuit for cruise control or the brake shift interlock system. We also recommend replacing any worn bushings in the shifter assembly while it is removed or accessible. These bushings wear out and can cause failure to engage in any drive range, including park.

What to look out for when dealing with Auto Trans Brake Shift Interlock Solenoid issues

When no power is present to the brake shift interlock solenoid, this may not be due to a component failure, but the vehicle anti theft system could be locking the shifter to prevent operation. If the security warning light is on, flashing, or otherwise indicating it is active, consulting a technician is the preferred next step.

Can I replace the Auto Trans Brake Shift Interlock Solenoid myself?

As this repair can range from simple to intricate, it is of importance to review the steps needed to perform this repair for the specific vehicle with a defective solenoid. This will prevent the DIY mechanic from getting too far into a job before realizing they cannot complete the repair. In most cases, this is a simple repair and an easy diagnosis as long as simple electrical circuits are understood.