P0446 chevrolet tech notes dirt and dust intrusion into the evap canister vent hose assembly resulting in restricted air flow may cause this condition there is a bulletin for the following models 1999 2007 chevrolet silverado classic models 2007 2008 chevrolet silverado models chevrolet factory service bulletin obdii code p0446. Easy chevy silverado gmc sierra evap emission code p0446 fix for free click here to donate to the channel https wwwpaypalcom cgi bin webscrcmd s xclick. P0446 gmc 2012 sierra 1500 how to fix code p0446 check engine light came on and was determined p0446 code with definition of evap system vent control circuit where is the evap hose in order to determine if its pinched or restricted vehicle 2012 gmc sierra sl v8 48l gmc p0446. a gm technical service bulletin for 1999 2007 chevrolet silverado and gmc sierra describes a problem when if the vehicle is driven in dusty environment the dust can enter into the canister vent hose and cause restricted air flow that can set the code p0446. All my check engine light came on last night when i started my truck to go home from work the code its throwing is p0446 purge or vent solenoids defective i need some advise as i would not expect this on a truck that is only 13 months old before anyone advises take it to the dealer i have
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