Check the starter on your truck, I had a similar problem when a power wire melted on the starter and short circuited the radio, and the dashboard lights, plus the fact that the truck would turn over but not start... pull all wires that may have melted on it away from the starter, if it starts up, that was the problem.
Another possibility, the fuel pump is bad, very common for GM.
fuel problem. make sure you have gas of course, check out your fuel pump, injectors, fuel lines etc.
One reason a 1993 Chevy Lumina may turn over but not start could be the battery. It may also be the spark plugs.
My 2005 aveo won't start
my 97 doesent either solution ; turn key again.
turn the key the motor turns over but will not start
TRY TURNING THE KEY OVER.
Two common reasons why an engine will crank over, but not start: There is no spark. There is no gasoline.
battery is good , c- pack's good will not start
Probably the fuel pump.
check for spark from the number one plug wire if no spark then start with the coil
Turn engine over and observe is distributor is rotating
Simple it will turn over but not start.