Ok, so I have a 2021 Silverado with the L87 6.2 and 10 Speed with about 48K miles on it right now. At 9K it had the right bank of lifters and pushrods replaced, then a few months ago, an actuator for one of the valves on cylinder #8, can't remember which one. Hoping to avoid more of this, I ordered the Range Technology disabler RA003B. After running this a bit, I noticed that it surges when cruising. I have emailed Range about it and will call them tomorrow, but was wondering if there is a device that actually works well? I do have a very good extended warranty that I don't want to void as well. Thanks in advance for any advice!