How do you get the back plug wires out of the back side of block on an 1989 Oldsmobile regency the ones with the heat shields on them?

To remove the back plug wires on a 1989 Oldsmobile Regency, you'll need to first ensure the engine is cool. Carefully detach the heat shields if they obstruct access to the wires; they may be held in place by clips or bolts. Then, gently pull the wire connectors away from the spark plugs, taking care not to damage the wires or connectors. If they're stuck, use a twisting motion while pulling to help release them.