Took delivery on 5/24. Have 200 miles
on car and it has been at the
dealership for 7 of the last 8 days.
There is a problem with the Engine
making a very loud "Resonance"/"Wind
up like a Turbo Charger" at 2500-2700
RPM and then it goes away at 2000 RPM
after feathering of the throttle.
Also, there is a very
loud "Rattle"/"Pingging" Sound at
acceleration thru 4200-4700 RPM in
2nd,3rd,4th. A $52K Cadillac with a
proven LS6 Engine should not have
these issues within 200 miles. Dealer
doesn't know what to do and Cadillac
Tech Support can't help them.
Dealerships should get better trained
to fix issues before selling a car
like this or the Corvette Dealers
should be the servicing dealerships
with Corvette Trained Engineers.