Jws2012silverado

I have a 2012 Chevy Silverado 1500 LT 4x4 with 5.3. I’m having problems with rough idle and traction control and stabiltrak. It’s throwing the code for the number 1 cylinder. Replaced the plug and wire and coil pack and injector. No change. Pulled valve cover off and both lifters in cylinder 1 aren’t moving. Just did a lifter change and put all back together except the valve cover. Started it up and lifters work for about ten seconds then they quit again. Still cylinder 1. Camshaft and everything inside motor looked to be in great shape when had it tore down. Should have replaced the vlom while I had the intake off but didn’t. Will installing the range afm disabler bypass the solenoids on the vlom and possibly keep from shutting off cylinder 1 lifters?