LBZ: Strange sound before truck warms up

[Jon7891]

Thanks everyone I will check for the lifted injector. Will it be obvious when I find it? Also how does that happen?

 

[Jon7891]

https://youtu.be/IMCBibgt3Ak. You can hear it better here. Ignore the rattle in the beginning lol

 

[2004LB7]

If you are by yourself can one squirt a bunch of WD40 or something similar into and around the injector hole and power brake it and then check if any of the WD40 got blown out?