OK, so here are my thoughts/results of the "helper" airbag install on
my 14 XL Denali. IT DID help the little bit of sag that I did have.
I put in 30 psi into the firestone bags, then hooked up trailer with
weight distribution bars.. Then started the Yukon... This order seemed to
help , rather than engine running the entire time.
The airpump definitely ran- but didn't have to KEEP running after hooked
up and leveled out..
The job was certainly a pita as I had to remove the coil springs to get the bags installed.. Of course I did a lot of cleaning, etc under there.
I put on the new ACDelco shocks - Z55 air ride .
The ride unloaded is a tiny bit stiffer with the new set of shocks unloaded.
Overall, I was really happy with what I did. I still need to to adjust my
Equalizer 4 point sway/weight dist hitch a tiny bit to fine tune...
But happy with the ride...
BTW, I did get the new upgraded rear brakes on too... Fronts will
be on soon. Along with the Edelbrock Etec SuperCharger and Kooks
Headers & Y-pipe with cats...
I could have used more power, so that should take care of that part.