truck don't want to shut off
 

Howdy, got an problem and was wondering if any one had any advice. When I try to shut off the truck, turning the key from run to acc. It won't stop until I get it to position that I can take they key out of the ignition. When it gets to accessory it will cough like it tries to shut off but it don't. The the dash lights up and says check gauges. Any ideas?

Bad ignition switch possibly Never tried that!