Why does the toyota tundra not start and just click?

The most common cause for Your Toyota Tundra to only click when You try to start it is going to be a dead battery. Lots of things can cause a battery to go dead, leaving the interior or exterior lights on is one of the most common mistakes that causes it to happen. The quickest way to fixA dead battery is to get a jump start from someone and make sure to drive the truck for at least 20-30 minutes before shutting it off so it has time to fully recharge . A more serious issue that can leave You stranded is a bad alternator which is the part responsible for charging Your battery whenever You are driving, to correct this problem You will need to have the alternator replaced at Your local dealership or mechanic.