Do you need an endorsement to drive a truck with air brakes?

Here's the breakdown:

* Commercial Driver's License (CDL): You need a CDL to operate any commercial motor vehicle, including trucks with air brakes.

* Endorsement: The CDL must have an "L" endorsement to drive vehicles with air brakes.

Here's what you need to do to get the L endorsement:

1. Obtain a CDL: Pass the required CDL knowledge and driving tests.

2. Apply for the L endorsement: Take and pass a separate written test specifically for air brakes.

3. Complete a pre-trip inspection: Demonstrate your ability to inspect air brakes during a pre-trip inspection.

Note: Specific requirements may vary slightly by state, so it's important to check with your local DMV for details.