Did plugs and wires today in the Suburban 5.3. Pulled original plugs with 108k and opted to do wires, too. All went pretty much to plan until I got to the last plug on the back passenger side. Long story short, not being a small person with small hands or wrists, I ended up laying across the front frame bar that runs the width of the vehicle, as a means of reaching with my right hand the plug and wire. I'm sure the neighbors were humored to see me like that. But, the plug is in, the wire is on and after five miles of driving, the idle is good and the CEL is off. Good way to spend $100, knowing they're done for 100k miles. (Much to the neighborhood's disappointment, I'm sure.)