[GTP Dad]

It is not hard to change the plugs and wires just hard to get to them. Start with the front and replace the wires one at a time. Make sure to set the gap properly and use AC or Autolite plugs. Don't use Bosch plugs. Also you may want to get a set of OEM wires from GM. You can get them from gmpartsdirect.com or rock-auto.com for a reasonable price. Once the fronts are changed you will have to either remove the dogbones from the front and rotate the engine forward to get to the rear plugs or risk some knuckles and use a ratchet with a u-joint to get to them. Rotating the engine is easiest but takes time and may require an engine lift to get it back into place. Good Luck!