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Hi fellow chevy owners. Stupid question number 4351. I recently bought a 2005 silverado 2500hd 6.0. When i turn the key to on/acc should the check engine light come on, and when you start the engine it should go off?
 

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But yes, all of the lights should come on if the key is in run and the engine is off, this is designed to allow you to do a light check.
 
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