It's a hydro-boosted brake cylinder(I believe), all HD's are using some sort of hydro assist. It basically applies more pressure and is a much better braking setup than the standard 1/2 ton. The99-06 5.3 trucks were known to be a little weak in the braking department. Many people would upgrade the rubber lines to stainless steel, upgrade the rotors, and calipers trying to get a little better stopping power.

 

Yeah..all it says in the spec sheets is that the trucks...All of them...Have power brakes.

I don't know if thats what this is...but my 03 had power brakes...so did my 83 Ford Ranger and my 86 Grand Prix. I thought Power Brakes just meant it had a vacuum booster...making it easier to push the peddle.

 

Yeah they all will use vacuum, but the hydro assist is... lol, assisting the vacuum, giving you more power to the caliper.

 

hydro boost FTW and 6.2 FTMFW

 

Yeah I just don't see it in the specs off the GM website for any model.
All it says is Power assisted Disc/Drum F/R Disc with 6.2L

 

x 100 and 1

6.2 period.

 

I've just finished arm-wrestling with myself for two months and finally ordered a Silverado with 6.2 and Max Tow pkg. Part of my "logic" was the 16-year-old that still lives in my 63-year-old right foot, and part was the four wheel disk brakes and 14-bolt diff that come with it (and are NOT available with the 5.3). I'm trading in a '99 Silverado with 5.3 and 3.73's (158 K miles) that's averaged 13-14 in 50/50 city and freeway (not including towing), and I really don't expect to lose too much mileage. I'll happily buy the premium gas or E85 just to get the additional POWER (oops, the 16-year-old is showing again).

 

Definitely a good choice at any age, congrats.

 

No. Just no.

Vacuum-assisted brakes use engine vacuum applied over a diaphragm to reduce the force required on the pedal. The vacuum pressure is small, so the diaphragm has to be large and thats why the huge power booster is mounted behind the master cylinder.

Hydro-boost brakes use power steering pump pressure to reduce the force require on the pedal. The power steering pressure is higher, so it doesn't need the huge diaphragm resulting in a much smaller unit.


ALSO, in all the 6.2L Sierras and Sierra Denali's I have looked at, I have never seen one with Hydroboost from the factory. Not saying it doesn't exist, but I think someone was mistaken, IMO.

 

So, yall know for sure the 6.2 has the hydro boost assisted brakes?

Nvm, we posted at the same time and you answered my question. And I guess I learn something new everyday. All I knew is hydro assist is way better.

Thanks.