First of all, thank you for including the year make & model, that's always helpful. P0446 Evap vent system performance The most likely culprits would either be the evap canister, vent solenoid, or purge solenoid. All of those parts are through a dealer only. Fuel pressure sensor is also a possibility.
Trouble code P0101 means: MAF Sensor Signal Range/Performance
5f041kg89hg51035
call your local Chevy dealership they will help you with codes
Trouble code P0405 means:Exhaust gas recirculation sensor A circuit low
change your o2 sensor
Maximum Adapt and Long Shift
code p0302 is cylinder no.2 misfire detected
Trouble code P1374 means: 3X Reference Circuit
Trouble code P0172 means:System too rich (Bank 1)
HO2S Insufficient Switching Sensor 1
I've got a better question, why is this question in the Chevy venture forum ?
red! no...purple! okay, green and orange.