Update..... the resonator does more than quiet the sound...... It manages the air pressures to all the intake areas. It could reduce HP due to uneven pressure / flow ??
I wonder if there is a resonator that does what it is supposed to do but not as large as the one in my Yukon...... Hmmm....
"Manages the air pressures to all the intake areas"?
You mean it manages the pressures between it and the throttle blade 10" downstream? After the TB, it's all "managed" by the manifold. This might be relevant on a high-end car. But, surely not on a run-of-the-mill workhorse truck engine from the manufacturer that tells us 3+ quarts of oil consumption between OCIs is acceptable. No way did GM invest
that much R&D into the intake duct.
I don't recall the exact specs, but I remember Black Bear's tests on the MIT for the pre-2015s showed something like +8HP and about half that in TQ. Maybe it shifts the power band up a little. Regardless, it's nothing you'd ever realize. Not when you're giving it more throttle than usual just so you can hear it growl.
You'd get more out of the sound and appearance than anything. While you're in the area, upgrade the other small GM flop- that pathetic seal between the filter box and fender.