Check Engine light/dash/not running issure. K5

[no moa]

Afternoon, I don't venture over here very often, im a 67-72/99-07 guy. But my dad has owned K5 blazers since 77. He purchased an 87 K5 with the fuel injected LO5 (350) and 47k original miles.
Its been sitting for a year, most of the time its been inside. Its been running good, we move it around the shop and he lets it run.

Today he backed it outside and it sat outside all day (its cold here 19 degrees). Started it up and got about 20 ft and it died trying to get it back inside. He said it just quit and now the check engine light is one.
I figured gas, but it has plenty, and i put 5 gallons of fresh in it just to be sure, won't start. Seems to have good spark from the coil.

The dash is out, only thing that works is the Volt gauge and the speedo.


Here is the quesiton (s)

1 What do i need to check the CEL? My innova tool won't do it.

2 Is the cluster bad? Is there are specific thing i need to look for?

I dont deal with these very often, so i'm kind of lost on this one. The CEL is my biggest concern at this point.

Thank you
Glen