What needs the most improvement on your H2?

[DURAMAX TIM]

Found this info on Power train website,

The 6.0L LQ9 is a more powerful evolution of the Vortec 6000, developed for Cadillac's luxury sport utility vehicles. GM Powertrain engineers delivered a cost-effective, assembly-efficient alternative to distinguish the 6.0L LQ9 from the LQ4 and deliver the additional power Cadillac wanted: flat-top pistons that increase the compression ratio from 9.4:1 (for the LQ4) to 10.0:1. The Vortec H.O. 6000 gives Escalade and EXT class-leading power at less cost to the customer than competitors’ overhead cam engines. In short, the 6.0L LQ9 is a premium engine befitting a premium brand.

Also this,
FLOATING-PIN PISTON FOR LQ4
The Vortec 6000 (RPO LQ4) is fitted with new floating-pin pistons. Introduced on the Vortec H.O. 6000 (RPO LQ9) for 2002, these pistons feature wrist pins that “float” inside the rod bushing and the pin bores in the piston barrel. Other Vortec V-8s use a fixed-pin assembly, in which the connecting rod is fixed to the piston’s wrist pin, and the pin rotates in the pin bore. In the Vortec 6000s, snap rings retain the wrist pin in the piston, while the rod moves laterally on a bushing around the pin. The floating-pin assembly allows tighter pin-to-pin bore tolerances and reduces noise generated during engine operation.

Application of floating-pin pistons in the Vortec 6000 is accompanied by a changeover, begun in model year 2003, to re-profiled polymer-coated pistons. The polymer material allows tighter piston to cylinder-bore clearances without bore scuffing, extending the benefits of the floating-pin piston and rod assembly and reducing noise generated by the piston’s movement within the cylinder. The net result is a quieter engine.

Here's the site,
http://media.gm.com/division/2004_pr...uck/index.html

Yell'r 04 Lux w/ air, sunroof,F&R brush bars
Traded 03 White Lux
03 GMC D/A CC SLT LB soon to be 04