Yes, but I never trusted it if I was more than about 3 seconds away from the truck.

If you read the instructions they will say something about it not being a substitute for a working emergency or parking brake.

Please don't try to use one as an emergency brake, or parking brake.

Another thought, if in an emergency you need brakes, and your regular ones don't work, then the line lock won't either.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-