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Old 08-06-2005, 03:01 PM   #1
TireSmoke420
One of the few GMC'ers
 
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Join Date: Jul 2005
Location: Des Moines, Iowa sometimes Butler, PA
Posts: 146
check engine light? HELP!!!

i recently put a new 350 into my 87. now ever since then when the tranny kicks down to passing gear the check engine light comes on and it seems to have a lot less power and the gas mileage goes way the heck down. does any one have any ideas on this.
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