Cylinder misfire

Hello,
New member and first post. I just recently got my sons 2007 5.7L back from the paint shop on Friday. While driving it back to the house I noticed the traction control, vsc and check engine light on. VSC and check engine were flashing. Acceleration was fine, but when I got to 45 mph and higher the truck was shaking really hard. I stopped in at autozone to have them scan it. It showed number 7 cylinder misfire. Okay...I replaced the plug and went to test drive it. Same thing. I replaced the coil pack as well with the same result. Gas cap is tight, no obvious wires messed up from what I can tell. Have I missed something?
Thanks in advance.

 

What was it in the shop for.

 

Maybe some paint?

 

I was think paint for body work.....

Check all of your Intake connections because if it was sucking air it will do the same thing.

 

Well, it was in the shop getting rhino liner removed then a fresh coat of paint.
Intake connections. Didn't even think about that. I'll look tomorrow at that. Thanks

 

After an in depth inspection under the hood...a rodent had chewed some wires. Lucky for me it was an easy splice job. Check engine light is off as well as traction and vsc. Took it for a drive after and it's good to go.