LAGA,
I have a 1997 5.7l GM Tahoe now at 130K miles. I was worried about the same thing (dinky filter) when I got it. Yea, the size of a small soup can.
I got it at 36K and all of it's life was 3K OCI except three runs of 6K with Syntec. I was biased tword low OCI in part due to filter size.
Despite using many FRAM filters it consumes zero oil in 3K and 2/3 qt in 6K with the Syntec 5W30.
After the three runs of 6K I did a normal 3K OCI and the filter seemed 'heavy'(22oz). I consider the engine to run 'clean' so filters always seemed 'light' upon removal. I can't prove this scientifically (I have attempted to document this by weighing filters before/after but on a different/new vehicle.)
Probably no need to worry but I worry nevertheless.