First use a screwdriver or 8 mm socket to remove the the air tube going from the air box to your throttle body, you can just remove it at the throttle body end.
Next hold the throttle open with one hand and spray some throttle body cleaner into the throttle body / upper intake
Push towards truck to open:
As you can see the you can now spray directly into the throttle body while you hold the throttle back.
Get some Combustion chamber cleaner aka Throttle Body / Intake manifold Carb Cleaner.
I use Mopar brand as its very effective and sprays very well for easy use..
Use a whole can if you want to, You might have to start up your truck a few times to get it to even fire up. It might even run rough for a few mins and smoke too...