How do you change spark plugs in a 93 olds cutlass supreme?

Good question. Make sure the engine is cool. Front ones are easy. The back ones are more easily reached if you rotate the engine forward. For those instructions, you need a repair manual. But, you essentially, unbolt the top two stabilizer arms- remove the airbox, attach a tiedown strap to the radiator frame and while rootating the engine forward with a bar, tighten the tie down strap to hold the engine forward. You should be able to get your hand behind the engine now. Some people even remove the alternator to gain access.