Identify Engine Misfire and Antifreeze Leak

What happens here

The video begins with the presenter noticing a coolant leak under the hood of his GMC dump truck, performing a sniff test to confirm it's antifreeze. He then gets into the truck, starts the engine, and points out the 'Service Engine Soon' light flashing on the dashboard. He demonstrates the rough idling and misfiring sound of the engine, which is audible and felt as vibrations in the cabin, indicating an engine performance issue. He suspects an ignition system problem, possibly related to coil packs.

Goal: Confirm engine misfire and potential coolant leak.