2001 Impala base 3.4L. 45K. A couple of days after a trip of about 1500 miles, I just saw a big puddle of oil on the garage floor right beneath the engine. (I'm sure it's some kind of oil, not coolant). Before the trip, it had an oil/filter change and
15-point inspection, everything was fine. Now the oil stick level is a bit lower, the coolant level is just right.
The car got a coolant leak 8 months ago, leaking from both head gaskets, according to dealer. The dealer replaced the gaskets, and changed engine oil as they mentioned the oil got contaminated by coolant. That time I learnt there is a notorious problem with GM gaskets.
Could the leak this time related to the previous one?