2006 trailblazer with 4.2 where would they be located

Question

I have a 06 trailblazer with the4.2 where should I start looking to get rid of p0496 code

Answer 1

P0496 Evap system flow during non purge

To get rid of this two componets can  causes it,  a leaking purge valve, where the FTP (fuel tank pressure) sensor monitor the EVAP condition. Or the FTP which report the incorrect condition in the fuel tank. Majority of repair when dealing with P0496 was the FTP sensor. buy a dozen sensor make it hobby in replacing.