The engine on my Tahoe is running rough. It idles rough when first started but after it warms up it's fine. Occasionally, while driving it will skip badly. I have replaced the fuel filter. Before I spend any more $$ on guesses, is there any one thing I should be looking at?
First, check your Engine Codes. Then check your Compression as GM V series engines are known for dropping the last cylinder on the passenger side of the engine due to valve failure and sometimes No 1 cylinder. Also note that the V8 series has a problem with blown head gaskets on the passenger side.