SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/cdl-inspect-parking-brake-test

How do you test the parking brake during a pre-trip inspection?

Set it, put the truck in low gear, and gently pull against it.

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  1. Set it, then gently pull forward in low gear ✔
  2. Roll downhill and pull the brake
  3. Push the brake pedal 3 times

Why: With the parking brake set, put the vehicle in a low gear and gently pull forward. If the brake does not hold the vehicle, it is faulty and must be fixed.

Huh, didn't know that: For a trailer, set the trailer parking brake and release the tractor's, then repeat.

The dad joke
What's a parking brake's favorite song? Stand By Me.
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References

Answer: Set it, then gently pull forward in low gear. With the parking brake set, put the vehicle in a low gear and gently pull forward. If the brake does not hold the vehicle, it is faulty and must be fixed.

  1. California Commercial Driver Handbook (DMV) www.dmv.ca.gov/portal/file/california-commercial-driver-handbook-pdf
    Gently pull forward against the parking brake to make sure the parking brake holds.
    Checked 2026-10-10.

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