CoolCharger

[Timster]

Don't do it!
I had a Cool Charger (Dyno Proven Products) on my 2004 Denali.
I had the Supercharger replaced 6 times. Yes SIX times! The bearings kept going out. Walk away as fast as you can!
If you want a S/C go with either Magna Charger or Whipple.
Best of luck in what ever you decide,
Tim

PS
185 HP Gain! That's BS. Ask them how they will prove it?
You will need before and after Dyno test's and four wheel dynos are rare.
I have allot of experience dyno'ing vehicles. To get 185 hp you have to spend big $$$$.
I est I got at the most about 20% increase in HP. The Denali has the same motor as the H2 the Vortec 6.0 ltr.