Engine Light - Code PO442 and a GM or other style vehicle appears to often lead to the fuel system.
Possible Causes?
1) EVAP Vent Valve
2) Fuel Purge Valve
3) Loose/Bad Gas Cap
"but" few mention incidentals like:
1) Gas Cap rubber O-ring may be bad
2) Electrical connector may be bad (EVAP Vent Valve)
3) A hose may be dislodged or bad!
This video describes a "possible" fix.
Code Cleared! No Check Engine Light in 200 miles currently since video done. SUV is not used daily due to other vehicle use.
Until the code resurfaces it is a gamble to think/believe that what was found saved the owner from replacing (2) parts to the tune of $150 "on top of" labor charges and lost time if taken to someone who may or may not have revealed it wasn't a part at all and pocketed the money instead.
Cost to repair? Nothing
Time to repair? Approximately 1 hour after discovering a possible fail
Item modified? Gas tank Purge Valve Bracket
Why that repair? Allowed using existing hose - providing additional slack
Cost to repair? Nothing! Materials/tools already available!