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Got the P21DD error code yesterday

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12-23-2019, 08:02 AM	#1
dennislbrooks Registered User Join Date: Feb 2004 Location: Williamsburg, Ohio Posts: 1,886	Got the P21DD error code yesterday 2015 2500HD Duramax --- 32000 miles Emissions, probably something to do with DEF stuff. I have a 5 year extended warranty but being emiisions I hope I have no cost -- my $250 deductible. Goes to dealer tomorrow. Anyone else face a P21DD? __________________ 1942 Chevy 1/2-ton Rod, 1959 GMC 1/2 ton Fleet Step side, 1967 Chevy SWB K10, 1985 Corvette Coupe 4+3, 2015 Chevy Duramax reg cab 4WD W/T, 2018 Bolt

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