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Hi guys, So i went to start my 1500 sierra and it would shake in park and would shake even more when put in gear. Also the reduced wngine power light is on. If anyone can help thank you!
 

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Howdy and welcome. There’s at least one thread about this topic here. Have you done a search for it?
 

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YOU have to do the engine codes.. post on the forum ...
bad gasoline / bad ign coil / rodent damage !!!!!!!!!!!!!
I kill squirrels they chew up everything .. I then feed the bird hawks ..
 

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J cat is right, check for codes, the truck will not go into limp mode without throwing codes
 
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