Hello all, I have an 01 LS V8 and roughly 3 months ago the spark plug boots were replaced to the tune of $540 at a local dealership. However, the problem that I was having has returned, due to having to spend almost a half hour trying to get up an icey hill. Towards the end of this ordeal the engine started to sound very strained and does not sound good at all now. It sounds the way it before I had the boots replaced, sputtering along when the gas pedal is pressed. So, my question is how difficult is it to DIY? I'm not the mechanically inclined type, but willing to take on the task. I have found out that the boots don't cost much at all, so why go back to the dear and drop another $500? Any help would be appreciated.