I think you have air in the brake lines.
No Good, Excessive brake travel!
Through on the floor
The brake fluid will be thinner in the summer heat. Check the wheel and master cylinders for any leaks. The leak will let the pedal go to the floor.
no you have a brake fluid leak somewere
Hold the Brake and floor the gas -_-
No.
If a truck has a clutch brake it would only be used when coming to a complete stop. By pushing the clutch peddle completely to the floor you would apply the clutch brake. This stops the clutch disc from spinning making it easier to shift into 1st or reverse gear. Normal shifting while driving you would not need to or want to push the clutch peddle to the floor to activate the clutch brake.
replace brake booster
Can't say that I fully understand the question. Rear window brake? Brakes don't work? Please explain. Does brake pedal go to the floor? No brake fluid in Master cylinder? due to leak. Brake pedal has normal travel but no stopping? Worn brake linings. Clicking in console could be normal, sounds like shift interlock is working properly. Allowing you to shift from "park" into other shift positions. Have to step on brake pedal to allow shift.
dont fully understand? if the brake pedal went to the floor there is a hole in the line some where or braking system If you are saying it is going straight to the floor like "whoosh" without any pressure then it is either your brake booster or master cylinder or both.
probably have broken parking brake cable.
usually they will leak out the back by the booster, your brake pedal will slowly go to the floor at stops or the brake pedal will go right to the floor when pushed.