What is engine code PO496. How do I fix it?
on 2008 GMC Yukon Denali

Do you have a oart # for what needs to be replaced for PO496?

Asked by for the 2008 GMC Yukon Denali
It is most likely your evaporative purge solenoid has failed and needs replaced. Here's the procedure http://acdelcotechconnect.com/pdf/tsb/tsb_411822.pdf
1 answer