Yukon shudders in cold

[Nicholas R solis]

Hey guys, I have a 2001 Gmc Yukon Denali 6.0 with 268500. It was working fine when I was in texas. But when I came back to work in Minnesota. Shes been shuddering whenever parked or idle. And in drive, it'll try to go forward.
Also the code for canister purge valve keeps popping up and I already have replaced it. Please help.

 

[Ilikemtb999]

Does it get better once the engine warms up?