Found this on Edmunds.

What's New for 2002
The Sierra C3 gets a name change to Sierra Denali in addition to a trick new four-wheel steering system. On standard Sierras, the previously optional Z85 firm-ride suspension is now standard on all 1500 models for improved handling and towing capacity. Base SL models now include air conditioning while uplevel SLE and SLT models add deep-tinted glass to the standard feature list.

 

that's not right i don't think. I was looking at a 02 sierra Denali before I bought my truck. I think it was called C3 only for 1 year, 2001. The 02 Denali I drove had quadrasteer.

 

You are correct. 2001 was a ext cab w/ awd and the lq4


2002 it got the quadrasteer

2003 the ss came out w/ lowered suspension awd and the lq9

 

It doesn't have quadrasteer which means it should be an 01' now that I think about it. That would make it a C3.

As for the boost, I say only 19psi since he has ran it on the dyno as high as 26psi...

 

Linky no worky for me.

 

I got around to clicking on it last night and couldn't get it to work either. I don't know what they changed, but that clip used to work great. I'll ask Kurt about it.

 

DAM! HE'S GOT BOOST! WHAT DID THE #'S LOOK LIKE WITH 26PSI? WOW!

 

i was just laugin at the 19 psi cuz that seems like a whole lot of psi, can stuff start blowing around there? 26 psi must have been amazing

 

Still can't seem to get the link working...even got high speed intrnet yesterday and nothing??

 

Well over 600 at all 4's. They have a nice all wheel drive dyno.