The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

Jimmyg 65 · 10-29-2010, 10:49 PM

Try ET100 from NAPA it is a fuel tank additive and injector cleaner that will help with carbion build up and a clean engine will help converter efficiency. I was getting a p0420 code also in my truck tried this and cleared codes and no light or code in 1500 miles.

10-29-2010, 10:49 PM	#6
Jimmyg 65 Registered User Join Date: Dec 2007 Location: Lancaster, New York Posts: 6	Re: Codes P0420 and p0430 Try ET100 from NAPA it is a fuel tank additive and injector cleaner that will help with carbion build up and a clean engine will help converter efficiency. I was getting a p0420 code also in my truck tried this and cleared codes and no light or code in 1500 miles.