so my PArk avenue has the series 2, however as it is a 95 it is not obd2 compliant, or at least the existing obd 2 connection has never worked, it has several issues, first and foremost, the engine has siezed, now at the time this happen i had just driven back from louisville (4 hours away) the day before and it was fine, the next day on the way to work, fine, on the way home from work, i was cruising just got off the highway, was going about 55mph and the engine started to sputter every time i tried to give it any gas, then i reached a stoplight and the engine was sputtering and sounded aweful, i was about 3 blocks from home so i was hoping it would make it, it didnt, as the stoplight turned green, i gave it a little gas and got up to about 2000 rpm and as i reached about 15-20 mph it quit, engine died and it stalled, the engine will not turn over at all, battery is good, alternator is good, i checked the engine oil before the louisville trip and it was fine, just had an oil change, i checked the oil now, it was dark and it was way above what it was suppose to have, the coolant on the other hand was gone, and i had a bad feeling, now the question is, could this just be a head gasket or is this the intake coolant problem that ive heard so much about, the car has only had this engine in it for about a year, it had to be replaced because the last one had a hole in the block, and yes it is a used engine, also cruise control doesnt work, no light comes on, nothing at all

The sputtering and stalling seem like its ingesting coolant into the cylinders. Indicating a bad upper intake manifold gasket or warped/melted plenum. Either way, your replacing the upper plenum, upper gaskets and lower plenum gaskets. Might as well replace the coolant elbow with the newer style aluminum ones. Use the aluminum framed gaskets for your intake manifold gaskets as well.

https://www.gmforum.com/mechanical-1...ts-l36-297702/
https://www.gmforum.com/mechanical-1...2005-a-304071/

Yea, what Justin said ^

i didnt say anything, lol