Good Afternoon,
I have a 2011 Suburban L96/6L90 with a TVS1900(3.1" pulley) bolted to the top of it, running basically stock everything else(for now). truck has 20's with 285/60/20 tires, tune is adjusted for tire size and also have applied some changes after reading on here and other forums. My issue is mainly in the 3-4 gear area, seems lagging and kinda lugs along when at part throttle. I feel that there are some simple changes that can occur that will ake some great gains in driveability and overall feel. I use EFI Live and do not have access to HPT. I was wondering if you could take a quick look and give me a few ideas to make some changes.