I have 37000 miles on my 16 3500HD GMC. Yesterday, I excelerated quickly to pass a car and I put out a cloud of bluish white smoke, alot of smoke/vapor. I went from maybe 15 mph to 35 mph. I goosed it again, and same thing happened. Then no more "smoke" for several miles. Then I goosed it again, under similar conditions, and I had a cloud for the third time. After that I could not get it to repeat. I was at 1/4 tank of fuel, and I am driving in winter conditions in Michigan. I did not add any cetane/anti gel to this tank. I add it sometimes, but I did not add it to this tank. IF I got to Autozone, will it give me a code? Do I need to visit the dealership? Otherwise it seems to be running fine.