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You put the truck in park with the key on, but the engine off. Then set the parking brake. Next flip the headlight switch from 0 or complete off position to full on at least three times or as many times as it takes for the horn to automatically honk at you. Then drop air out of the left front tire by pressing on the valve stem until the horn honks again. Now reset the tire pressure to 30psi. Next repeat the deflate, honk, reinflate procedure exactly as described above for the left rear, right front, and right rear.

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16y ago

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