I have heard it upon first start up since about 40000 miles. It disappears quickly but worries me a bit since any noise usually indicates wear. The longer the vehicle sits before driving the more the tapping occurs. It does not seem to occur if I drive it several times a day except upon the first start up of the day.
I took it to a dealer some time ago and they said that it was because the shop where I had the oil changed had used a cheap filter and I should switch to a GM oil filter. I did switch and it seemed to help some but the noise is still there and the dealer now says it is normal.
Anyone else have a similar issue or any idea if it is indeed the quality of the oil filter?
Thanks for any info.
Ron T