Turn key to run and starts on its own and starter will not shut off. Replaced altenator,altenator connector,starter,ignition switch,lock cylinder Also look at all wires in fuse box and wiring harness Did replace starter relay and it ran for a day and started acting up again
SOURCE: truck tries to start without key in the ignition
The 2004 colorado does have an electronic starter, so there might be a short in your connection coming from your battery. If you were to disconnect your battery and then connect it again there is a possibility that your truck may try and start, could ever start.
SOURCE: H2 Hummer
Today 11-12-08 my 2003 H2 Hummer would not start. Checked battery it ischarged. Cables tight. Tried to start with portable booster pak. No go. Tridto jump start with my wife's Suburban. Still no go.
When I turn the switch I hear a single click and that is it. No engine turning over. While trying to start with key the headlights go out. Out of ideas, Will take to Chevy garage in am. Will post solution.
SOURCE: starter keeps turning even when key is turned off
Curious, do you have an autostart installed? I had that happen that the Autostart shorted and just kept telling my starter to continue cranking
SOURCE: My 1998 bmw 528i won't start , I got dash light ,
all those problem have to do with modules on the vehicle have the car electronically scann and it will tell you where and what
SOURCE: 2003 dodge caravan won't start
My 2003 dodge caravan would not start after driving about 1/2 hour. I stopped for coffee and when got back in to start it started I switched gears and it stalled. I tried to start again switched gears then it started but only for 2 sec. No clicking, no cranking sound just would not start but battery functions were great. Spent 2 days with a mechanic who could not resolve so sent to Dodge. After a day of putting wires back and checking out the problem they said it was the computer. Said that it was bad and could be replaced at no charge due to malfunction. Yes, it worked fine afterwards no more problems. They also said that some of the computers are found to be defective like this one so I hope this helps you in the right choice to have the dealer check it out if you are unable to get a computer reading and there is no obvious short in the system. Free sounded very good but as you know there is no such thing as really free as they got me for other things $350 worth. ouch!
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