The throttle body is black from what I can see is it worth sea foaming truck

 

It won't hurt anything. You could also get throttle body cleaner and clean the throttle body by hand.

 

What gasket do I need to do that

 

a throttle body gasket. 8166-05036061

 

Can't you take more then just throttle body off

 

You can take the entire intake off to clean it...the question then becomes, can you put it back together?

 

I mean I'm sure I can I did oil pump seal and main seal myself. Just remember to mark where vac lines go and harness plugs?

 

Yes, take off the plenum (and once you get a look at it, you'll probably want to clean the lower intake manifold too). As you can see, the plenum is an odd shape, so it is not easy to clean inside it. I'd recommend removing the "end caps" (which appear to just be freeze plugs), but pick up replacements first (the only way I know to remove freeze plugs destroys them). Get a bottle brush that you will throw away. Soak the entire plenum overnight in a strong solution of dishwasher detergent, then go at it.

You don't want to get water anywhere near the TPS (or anything else electrical), so I'd recommend removing the throttle body and doing that by hand.

You'll need a throttle body gasket, and the gasket that goes between the plenum and the lower intake manifold. If you clean the lower, you'll need intake gaskets. If you remove the lower to clean it, you'll have to remove the fuel rails, so you will need a set of "crush washers." These are dealer items, they're about a buck apiece, and NO, you can't reuse the old ones. No matter what anyone on this list says (unless you're happy taking the chance on dying a horrible, fiery, death. Then go for it!) Once you remove the lower manifold, you might as well replace the injector oring/seal sets.

Why go to the trouble? At least on mine, there was a huge amount of "gunk." Enough that it actually blocked the vacuum ports to the AC and PS idle-ups. If it had gone any farther, it would have blocked the EGR inlet tube, and then I couldn't have passed smog.

All in all, a worthwhile (but messy) job.

 

The only benefit a can of Seafoam will do is make your wallet lighter by 10 bucks.

 

But where are all the idle ups and stuff at none are located or the very bottom where intake goes to head I assume?