Coolant flush
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Joined: Oct 1999
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From: Charlotte, NC (formerly Endicott, NY)
Coolant flush on all GM cars has been 5 years since 1997. The A8 transmission fluid change is 45K miles. However, if you have an early 2019, you may not have the new specification transmission fluid in it. From a transmission durability standpoint, it might be a good idea to do the Triple Flush to purge all of the old fluid and make sure the new specification fluid is in the transmission.
Bill
Bill
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If you have not done a coolant change on the car, time to do so. Five years is the time limit unless you meet the mileage limit earlier than that.
