Dead battery, disconnected starter cable, or the engine is missing.
Engine Seized? Check for loose or corroded battery cable Check for bad starter Check for bad starter solenoid
As long as the engine is not running, you can wipe the starter casing down of any oil spilled on it. Since the battery delivers a substantial voltage to the starter which is required to crank the engine; you wouldn't want to accidentally touch the terminals on the starter when it was turning over.
if it wont crank the the starter is probally out but if it cranks and the motor doesnt turn either the belt is to loose or the engine is locked up
Starter is not working.
check connecters going into the ecu at the gearbox end of the engine or crank sensor at the back below the starter check connecters going into the ecu at the gearbox end of the engine or crank sensor at the back below the starter
That's insufficient information. In general, "crank over" means that the starter is not turning the engine when you put the keyswitch to the "start" position. The starter can fail to engage because of a failed starter, solenoid, keyswitch, neutral lockout switch, faulty battery, failed alternator or just about anything that would drain the battery.
Starter won't crank over engine? Battery or battery connection issues. Starter cranks over engine but engine won't start? Being a GM product I would suspect fuel delivery problems (bad fuel pump).
it might be the starter. have it checked out.
Check your ingnition cylinder ...
the truck will not crank or anything with the key it wont even starter when you ark the starter all it does is whizz
dead battery bad terminal connections starter relay