Howdy
I have had a leaking fuel manager and by the time the trickle of fuel got down to the bottom it was nasty enough to look like oil. It came down right off the starter bolts. IMHO...if your starter has been loose without the nose bracket, I would take it off and give a good look. Also inspect the block area. When you put the NEW OEM(don't use any generic china crap, buy them in the GM package if you can) bolts in, make sure you torque them to spec and then after a few days of driving, retorque and check them often. As stated above, cheap insurance against a broken block.
Good luck!
1996 Chvy 3500 CCDWLB 6.5 Heathed, NO vac, marine injctrs, ARB bumper, BIG pipe, 3" lift, bright lights, bypass oil system.
1986 Chvy 6.2 M1009 blazer RAM AIR, Headers, Custom interior
2001 Chinook RV, V10 gas
1974 John Deere 1530 diesel tractor
1993 John Deere 455 Diesel lawn mower
1967 GTO, 1989 Honda Transalp
2009 VW Jetta TDI, flashed and piped, 6speed, fun car!
1998 6.5 suburban, stock, daughter's
1993 6.5 3500 CCSWLB GM8, Heathed, big exhaust, gauges, Son's
1984 6.2 ATS turbo 3500, SCDWLB - Son's
3 kids, 1 wife, 1 dog
Gunsmith, Tactics Instructor, Fabricator USMC 87-93 Semper Fi!