Are the arms the same length?Let me shed some light on this situation for you. You are correct Denali envoy came with leveling suspension. That being said. The black arm sensor are for those models as well as a couple others. Buick Rainer, Saab 9-7.. You can use the black arm sensors on the trailblazer SS but they can not be bolted in the stock location. You have to remove the front bolt and turn the sensor towards the front of the vehicle to lower the ride height. Then bolt it back down using only one of the bolts. Make sure to do it evenly. The black arm sensors are set for the factory ride height of the regular suspension vehicles. The TBSS in 2 inches lower from the factory and thus has a different sensor. Good luck.
You can use Envoy sensors, but like nojokes09 said above, just need to remove the front bolt and rotate the sensor forward. This way the sensor "sees" the truck is at correct ride height and won't kick the air compressor on trying to raise the truck. Think of rotating the body of the sensor instead of moving the black arm to set height.Thanks for shredding light on this. So if I’m understanding correctly, that means it wont work for me because I have my trailblazer lowered on the bags currently with bell tech shocks because I adjusted factory sensors... if I use the envoy sensors, I can probably only adjust them to factory SS height but probably no lower than that correct? I have the truck at 31” in the rear currently