noobie on the block,96 yukon 5.7L slt

[alp2420]

i just purchased a 96 yukon on saturday with the check engin light on. there mechanic is going to look at it tomorrow while im out for the weekend. it says it running to rich on both sides. the IACV was complaining and its missfiring on cyl 6 about 10,000 times every 3 days is what im seeing. but there are a few things on it like the grill is cracked along the bottom edge of plastic chrome. there is a dome light above the driver/passenger area thats missing. and my passenger and rear windows wont roll down by the switches on them. but they all work on my door, maybe the window lock switch on the driver door? where would i find a dome light and a new grill. i havent had the time to do a search im a noobie here and work is piling up. btw i work in a body shop but im a mechanic by trade so nothing is really an issue. but other then that it has stock rims. the look like there off a chevy but there missing the center caps and if i could find them ide like to put them on so you dont see lug nuts on it. or maybe a cheap set of rims. i need some running boards too. and to tint the two front windows. i already yanked the stock radio and cd player that was a joke half of it wasnt even lit up and buttons were smashed in..wtf? so we replaced it with an alpine deck and thew in a kenwood 500w amp and two infiniti kappas to set her off for now. i will get some pictures cause for the year and having 153xxx on it shes pretty darn clean.