2002, 50,000 miles. L31 small block 5.7 vortec engine. Up to now, I've only changed oil & filters each 3000 miles, greased suspension, new tires and battery and I just now flushed the coolant. Luckily it was very clean. I wasn't keeping up with the whole DEXCOOL story. I don't see any intake gasket or other leaks. It held 15 lb pressure steady for 5-10 minutes. Could be a small internal leak I suppose.

I'm asking for suggested inspections, replacements, etc. I bought a FSM a while ago. Very helpful!

On my list of possibilities:

1. Repack wheel bearings, inspect brake pads/linings. Guessing their ok, mostly highway miles.
2. Inspect, replace plugs, rotor?
3. Replace air filter seems a good idea. I blew some dust out of it.
4. Check rear differential oil level.
5. Serpentine belt is fair. Small cracks in the vees looking at the fan pulley.
6. Anything else? Common problems? Transmission fluid, filter?

I don't have money to too quickly replace parts, but looking for common sense.

Allan