The only aftermarket “performance” mod was an AFE intake installed by the dealership and supposedly adds 46HP. (I’ve had people drive it and say it feels faster than their stock Z06, but who knows)
Within the past three years work done by dealership-
New Supercharger.
Shift cable.
AC blower.
Belt tensioner.
All mag ride suspension replaced.
Drive shaft and torque tube.
Flex plate.
Radiator reservoir.
Spark plugs.
Fuel system cleaning.
GM Maintenance schedule followed for the life of the vehicle. Vehicle has always had an extended warranty.
I had the 2015-16 heat soak issue addressed.
Looking to get another Escalade or something bigger.