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Brakes

my brake pedal goes to the floor.

This is an accident waiting to happen.

Stop driving this vehicle and have it towed to a repair shop before you hurt yourself or someone else.

I am assuming that you are asking what to do about this problem, rather than just informing us.
Based on that assumption, all I can say is:

Have the truck towed to a competent (non-chain) mechanic.
It is not safe to drive in this condition.

Most likely you need a new master cylinder, but it is possible that you have a major leak in the brake hydraulic system. Either way, do NOT drive the vehicle.

Find a competent mechanic who can lower your car’s floor.

Twotone

We cannot emphasize enough…DO NOT DRIVE THIS VEHICLE. It is definitely unsafe. Have it towed to your trusted mechanic.

Hey Twotone, thanks for the laugh.