Reviewed By John L. B (GAINESVILLE, TX) Reviewed for a 2009 GMC Sierra —9/27/2016 9:13 PM
Dealer cleaned the stock sensor, but codes continued to come and go. I saw in a comment section of one of the Duramax discussions that the problem might be more frequent in EFI treated engines. I therefore purchased this, installed it and 4 weeks later have not had a code show. The engine is a bit peppier.