Mr.B

We have a 2009 Tahoe LT 4WD with just over 68,000 miles. The oil was changes a few weeks ago and I noticed that there are a few drops of fluid on the driveway this morning. I took the vehicle back to the oil change facility and had them have a look at it. They said that the drain plugs were tight and dry, but there was evidence of a leak from somewhere on the left hand of the engine. They asked me to go into the service pit an have a look for myself, which I did. Sure enough, there is some fluid ( I presume engine oil) on some areas - not sprayed all over, but here and there.
Any ideas as to what this may be caused by?

trainwreck91

Make sure the filter is screwed on tight