"i guess i mean what are the warning signs or any symptoms you noticed before failure? "
ours had no signs before sputtering on the steepest part of the Santiam Pass going up at around 4500'.....it quit briefly, I about coasted to stop, it fired up again once, made it around the death trap corner, died for a minute....started up and ran a few hundred yards to a side road.
Wide 2 lane portion of treacherous mountain pass with heavy traffic.
After being flat-bed carried down the mountain & left overnight, was able to fire it up & drive to the mechanic shop a few miles away.
Still a bit traumatized by the event. This makes the 3rd Chevrolet truck Santiam Pass has killed for me.
It's good to know about the 'overheating' aspect. I suspect the clogged part makes the pump work to thermal break down.
Ours is a "2004" model but don't know early/late/etc. Didn't even get a vehicle booklet with it.
On the other hand, I'm pleased with the power band of the 6L Chev motor...seems well mated with the size of the 213.