Sounds like a vacuum leak on the passenger side of the intake to me, or either a crink or blockage in the fuel crossover pipe that takes the fuel from the drivers side of the intake to the passenger side.
What decal do you mean? I got the idea to paint it all from the picture of your lower valance and you saying that you painted it.
The decal that's shown a little in this pic....
And I started on painting my under hood stuff today also(thanks to you), but painting the words with a brush is time consuming....
Yes it did come with 4.10 gears. In 2003, most of the Z71's on the dealers lot were 4.10's
Wow, I did not know that half tons came with 4.10s as an option.