speed deamond Posted February 8, 2005 Report Share Posted February 8, 2005 I am having trouble with my 2003 SS, The service engine light is on. I took the truck to Munday Chevy and they told me it was an exhaust problem and was not covered under my extended warr. Does anybody know adout this code or had the same problem? code p0446 power train mod eng sys malfunction. They also told me the poping in my steering wheel was not covered under extended warr. Thanks for your help. Link to comment Share on other sites More sharing options...
Nightshift Posted February 8, 2005 Report Share Posted February 8, 2005 Not knowing the details of your extended warranty, but... I've never heard anything good about Munday. I'd check into another dealer. I use Lawrence Marshall 610 & Kirby, I followed the service writers/mechanics from Courtesy Chev. WW Link to comment Share on other sites More sharing options...
cadowns Posted February 9, 2005 Report Share Posted February 9, 2005 Check this old link from ls1tech. It has a lot of info about your error code. Bad cats I think. http://www.ls1tech.com/forums/archive/index.php/t-46446 CD Link to comment Share on other sites More sharing options...
1stSS Posted February 10, 2005 Report Share Posted February 10, 2005 my 03 has been in several times for this code P0446, Evap Vent system performance, last time they changed the contents of the vent canister, said it was saturated with water Link to comment Share on other sites More sharing options...
qwank Posted February 12, 2005 Report Share Posted February 12, 2005 a 446 is usually the vent solinoid on the silverados. its above the gas tank between the bed and the cab on the right side. Link to comment Share on other sites More sharing options...
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