Slight oil drip coming from around oil pan

[fernandito7]

I have a 2007 LT3 Tahoe with about 13000 miles. I recently noticed small oil stains in my garage. I looked underneath the tahoe and i see oil like scattered around where the oil pan is and around the metal bar that is underneath the oil pan. I have to constantly clean it every 3 days. What could it be? I oil filter is tight and shows no oil dripping from there. Also the oil pan plug is tight and oil does not drip from there. Any ideas?

 

[mary900]

I had to replace my oil pan drain plug right before it went out of warranty. Dealership indicated bad gasket. I haven't had any problems since.