-Plenty of gas, fuses are fine, battery @ 14.4v
-Replaced the plugs and wires because they were worn out anyway, but that didn't help.
-Removed Cap and Rotor. Heavy corrosion, replaced both. Still no start.
-Tested the coil with an ohmmeter, turns out it was bad, replaced it, still won't start.
-Tested the plug wires with a spark tester and I see a spark.
-Tested fuel pump, you can hear it turn on for 10 secs at ignition.
-Fuel injectors spraying heavy into throttle body at ignition, doesn't seem to have a problem with pressure. Strong fuel odor comes from under hood after attempting to start.
-Checked EGR valve. It was stuck. Replaced it. Still no start.
-Testing ECM via SES light. It displays code 12 indicating system is operational. No other codes flash.
-Tested power and ground to ESC, TPS, MAP Sensor, & Coolant sensor. All fine.
-Checked Ignition module. Appeared to be in bad shape. Replaced it. Still no start. Well, I have exhausted all my and the GM shop manuals resources and are here to ask or additional help. Any ideas would be greatly appreciated. Thanks...