Warning Lights and Parking Brake

[Cliffy433]

2001 3.1L V6 LS 90000km

Things I've Already Found and Either Fixed or Ignored:

Losing Engine Coolant - found missing coolant in oil, no worries, didn't really need the $1000 dollars anyway

Fan Blower Switch - stopped working, local service station wanted $100, I did it myself for $35

Condensation in Headlights - here's my thought, when I change the bulbs, I'll seal up the light's hole with Duct Tape, and immerse the bastards in water, mark the leaks, dry the whole thing, and seal with Aquarium silicone. Think it will work?

Things I've Found and Would Like to Fix:

Problem 1: Check Engine Light - there seems to be a consensus on this forum that as long as the engine is running smooth, not to worry about it. And then there's a grocery list of possiblilities incl: air filter, O2 sensor, etc. Can someone retype the list of possibilities, but this time, put an asterisk or some other mark beside the ones I can handle on my own?

Problem 2: ABS Light - been on for quite a while, ABS functions intermittently. Plus, I learned to drive in winter at the back of my old man's hand - so loss of the ABS hasn't terribly affected me.

My Mechanical Experience:
Changing Oil, and Filters
Changing Fuses, Lights
Changing Belts
Changing Spark Plugs and Wires
Installed One Stereo Years Ago - set the alternator on fire, I don't do electrical anymore
Problem 3: Changed Drums and Shoes on current Malibu - made a mistake - no parking brake now