If you want to lower for 'stance', sure there are options.
If you want to lower because you want it to handle 'better', nope.
Almost universally, the 6th Gen guys that lowered their cars with the MRC had detrimental results on track/AutoX.
If you completely replace the MRC with DSSVs or a complete system you can get better specific use case results.
In their defense, GM has some of the finest chassis engineers in the world. The Alpha chassis is one of the best handling ever made. I'd be really careful when trying to 'improve' it.