Question about 1997 Chevrolet C1500
P0420 code is usually a sign of s weak fuel pump, and needs to be replaced. Also if you replace the pump and still get that code, check your fuel lines back by the tank and make sure that they are not pinched or smashed. this will also give the same code due to restricted fuel pressure, on the ruturn or supply line........ Good Luck
Posted on Oct 08, 2010
Are you running regular gas or not you should be running special unleaded fuel
Posted on Jul 01, 2009
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Posted on Jan 02, 2017
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