Newbie needs help with Hummer H2 timing question??

[inputapmech]

I have replaced the stock timing gears and advanced the timing by 2 degrees... What changes do I need to make to the ECM to take advantage
of the timing change... I am trying to increase low end power???
Thankyou for any help...

[inputapmech]

Sorry forgot to add 2006 Hummer H2 6.0L LS1B system