I have a 92 suburban with just over 240,000 miles on it. for the mileage, it runs great. The problem i have is when i start it in the morning it runs pretty rough (sometimes it will start, spit and sputter for 5 seconds, then die and i have to start it again and it stays running) once i put it in gear and go, it runs perfectly fine. it almost seems like a low idle speed issue to me but i dont think you can adjust the idle speed (or can you?). A while back it had a coolant leak from the head and i ran a sealant through the colling system and all was great for a year or two.

To sum it all up in a simpler form...its rough right after it starts but once it gets going...its great. i dont even really have to move...it just push the accelerator just a little bit to bring up the RPM's...it stays running smooth.

oh and to throw a monkey wrench in there...i had a scanner on it and everything was normal