Truck clicks once but wont start?
Look for a loose or corroded battery cable connection or a faulty starter solenoid/relay switch.
It clicks?What are you talking about clicking? you turn the key to start the car and all it will do is click,click! or when you try to start it it will spin over and then stop and click.! All I can think of if your car battery isn't good enough to start the car and you will get a click or you have a bad starter and it will only click. need more info