Service engine soon EVAP system

I have an 01 Yukon SLT my service engine soon light has come on and the code came up for an EVAP system problem. Does anyone know if this is an easy fix? car is still running as if there are no problems.

And the code is?????

And the code is?????

The Code was P0442 thanks! I have already had a small leak in a hose repaired and code cleared for about a week and has come back.

Has comeback or has not come back?, also a poorly fitting or loose gas cap is a common area for this code.

What Hose Is For THE CODE 0442? I HAVE A 99 YUKON WITH THE SAME CODE PROBLEM PLEASE HELP

Loose or bad gas cap first, clear the code and see if it returns, for starters. This is a one year old thread. I will lock this one, if any futher issues start a new one.