It seems like when I start my truck it idles really low (like 400 rpms) until I give it a little gas. It idles a little higher then but probably still a little on the low side. Its not that big of a deal but a little annoying. I know its got to be something small, any of you guys have any input?

 

Maybe the cold-start injector not functioning properly?

 

Not aware the 22re has a cold start injector.
The cold fast idle feature on the 22re is controlled by a water operated vacuum valve - it creates a vacuum leak till it warms up. The first time mine quit (at about 8 years old, my friend at the dealership said just replace it. It was $50 - back then a lotta money) so I took it off and opened it up to see what was inside. Turns out it's easy to adjust, but you wouldn't want to pay a mechanic shop rates to fiddle with it. There is a bi-metal that opens and closes, and a set screw to adjust it. It took a few days to get it right - adjust, reinstall, start it tommorrow, re-adjust, reinstall etc. Had to do it again a few years later.

When you remove it you will lose some coolant. Have a couple of wood plugs handy or squeeze the hoses shut with vicegrips.

Here's what the service manual says:
It is possible to visually check whether or not it is working.
With the engine cold (and off), disconnect the vacuum hose from each end of the air valve. By looking through the air valve it is possible to see if the bypass valve is open. (I suggest a bright light and a mirror will help with this.) If it is open, reconnect the hoses and run the engine until it is up to operating temperature. Disconnect the hoses again and now the bypass port should be completely closed.

It's located under the FI plenum on the pass side near the front. This is basically what it looks like (shown on V6)

 

My FSM shows it (cold start injector, aka start injector time switch) just left of the water temp sensor, both located between the throttlebody and valve cover.