heater box (plenum) replacement

Need to replace this. Want to do it myself. Not sure if mechanical enough. Have done timing chain on another vehicle. Done brakes, calipers, tie rod ends, shocks, fuel pumps, water pumps, radiator replacement and plenty of misc. I understand that the dash has to be pulled out. I am scare of airbag. Would appreciate any info or advice. Especially on disconnecting passenger side air bag.

Thanks,
Jack

DONT LET THE AIRBAG EXPLODE! haha, but seriously go down to your local Auto Zone or Advance or which ever your prefer and pick up the book on your year truck. It'll have step by step to replacing that....and everything else you ever want to do.