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Crank the motor, let it air up, cut the motor off. Get outside of the truck and find out if you can detect the leak by listening for it. This may require you to actually get under the truck. If that doesn't work, put a little bit of food colouring into your air lines, and do the same process again. Look for where it comes out at.

If you don't know what you're doing here, working on something so crucial to the safe operation of that truck as the air system, I'd recommend you take it to a certified mechanic.

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14y ago

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