the truck light is on how can i turn it off?
You mean dome light? Pull the fuse or pull the bulb until you can figure it out.
No. I mean check engine light and how can i turn it off
The older rigs you could just undo the negative on the battery for a few minutes and it would clear. The new rigs you will have to get the codes cleared or fix what is the matter before it will go off. Probably a bad O2 sensor.
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