Oldblue90

A little better video I have found.

I ran into the issue of not knowing and took mine to the stealership and paid $1000 for one injector and a ignition coil. Never again. I had searched for days to figure out the issue and finally came upon this video where he did this on a suburban or a tahoe but it is the same process for a silverado. Looks time consuming but the parts are less expensive. Roughly under $400 if you do all the parts.