Quote:
Originally Posted by barnesbr
It’s been 5 days since my last update. Went back to the dealer yesterday to try to get some more information and a status update. The service advisor went to the shop to see what was going on. He couldn’t find the technician, but my car was still on the lift with the transmission pan re-installed. The last time I spoke with GM, they were taking a front pump off of a 2019 Tahoe to see if it had the same noise. The dealer and GM are still trying to say they don’t even know if there is anything wrong. I told them I haven’t heard of a single other person hearing this noise. If you guys could listen carefully next time you have your A10’s out and report back, I would greatly appreciate it.
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The only rattle type noise I’ve heard is one that I’ve been able to reproduce by power braking to load the drivetrain and switching between drive and reverse. Mine has also always made a gear whine type noise since new. I was trying to diagnose that when I noticed the rattle. I’ve never heard it during normal driving though.
I checked 2 other brand new A10 cars, and they both made the same whine noise. Pretty sure it’s that gear to gear pump. They also made the rattle sound when loading them between drive and reverse like my car. I might have some video I can post. Though my conclusion was that my car is 100% normal.