HPTuner software is available for LS4
Years
Avail. Model Type Single Vehicle
05-06 Chevy Corvette 6.0, 7.0 (4L65E)
05-06 Chevy SSR 6.0
06 Chevy Impala 5.3
06 Chevy Monte Carlo 5.3
05-06 Pontiac GTO 6.0
05-06 Pontiac Grand Prix 5.3
Has anyone tryed the new HPTuner software yet ??
http://www.hptuners.com/order.php


Let us know how it works... 