As for a mass airflow sensor, your truck doesn't have one.
What is that little sensor on the front of the 5.7 HEMI air-cover doohicky? Right in front, with a small wire harness hooked up to it?
I took it out and cleaned it up. Inside, it looked kinda like a small christmas tree light. Two little wire connectors with a small plastic-coated sensor on the tip. Very fragile looking thing.