Hello. I just bought a 2008 Silverado 4dr 2wd 5.3l. The original owner sold it due to it not starting. Was not a repeating issue, but one day it would not turn over. He took it to a questionable shop and they just said it must be electrical....that's it. Fully charged battery(tried boosting too), turn the key, at first very little comes up on the dash. Soon after I get the common gauges etc. No crank at all. Checked voltage at both ends of ground wire, both good. I do not get a line under any shift positions on the display, no matter what position I put the shifter in. I would love pointers for trouble shooting from here. I am more mechanical than electrical, but willing to learn and try anything. New starter has been installed after no start issue.