canister purge valve where is it located on my 03 cts cad on 2005 Cadillac CTS

i check code po496 came up i change gas cap still having problem what do i do

by in Davenport, FL on October 23, 2011
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
ANSWER by , October 24, 2011
have it diaged for a pinpoint failure. a code never identifies a bad part, just a failed system. Roy