It's been a couple weeks since I last posted about the '97 GMC Yukon 5.7L, then it was the A/C. That seems better now, but I have other issues I was hoping for some help on. First off, I went to turn the fan switch on, the speed switch would not turn easy as usual. At first a wiggle and I'd get high and off, now nothing. Any advice on replacing this? Second, just the last few weeks, the truck has started idling rough on start up, then stumbles a bit getting going. Once running she's fine. I planned on doing plugs, fuel filter, pcv anyways, anything else you can think of? I'll get the codes read on my way home tonight at the auto parts store (free!), if you recall the truck aways codes as the cats are not functional. Just want to makes sure there are no other codes hiding. Thanks all, have a good weekend!