Well after spending a lot of money and making some uneeded repairs, I got the 99 LTZ running. Insured, tag, and smog test.
I have been driving it all weekend. No issues. I noticed the throttle cable sticking on hard acceleration and low coolant sensor (but not running hot and coolant is full as is overflow tank). One it cooled off, I pulled engine cover to see if accelerator cable was damage in some way. I worked it back an forth and seemed fine. I then depressed the accelerator pedal numerous times. Seemed OK. Started car. very rough. Engine light. Grabbed scanner and #6 misfire. Cleared code. Started car accelerated a bit and then ran very rough, died, wont stat at all. Now multiple cylinder misfire.
This is where I was when I parked the car in the garage three years ago after the shop told me the coil packs and ignition module were fried. That was all replaced.
I can't believe I caused this just by moving the accelerator cable back and forth. Heck you have to do that to reset the change oil reminder.
Man o man
Edited. Now to add insult to injury, I went out and tried to start. The engine is locked and will not turn. Other than a coolant leak, or worse (no knocking when running), could it have pumped a cylinder full of fuel and hydro-locked? I will have to pull the plugs later and see if it will turn over later.
I love the car but when it decided to die, I guess it really wanted to die.
Corndog...