Just installed new update but have a noob question they say it's LGH capable what is this?

Just installed new update but have a noob question they say it's LGH capable what is this?

The LGH is the van engine as well as the cab and chassis truck engine. It is derated to 335HP VS the trucks 397HP.

I knew it was something simple. The performance testing looks good never tried it out yet but gives you a lot of parameters.

What else is new in the update?

Hopefully some improved throttle response ...?

As far as I can see, the only thing new is the speed test/1/4 mile time, and new GM codes.... Haven't noticed anything new in the throttle...