Question about 2005 Chevrolet Silverado
Ok.. here we go.. engine is idleing rough blows black smoke when motor is revved up..poor gas mileage.. and get 3 codes coming up..and they r PO171 PO174 and PO300.. i changed the o2 sensor on bank1 didnt help..any suggestions??..
P0171 and o0174 is lean replace intake gasket they will be a teal color,the old ones are red. i work for chevrolet.this is a common problem
Posted on Feb 12, 2009
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Posted on Jan 02, 2017
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