C7 bad diff oil
Discussion
Hi guys
Recently purchased a 2019 grand sport with only 2.5k
After reading about needing to change the differential oil before the recommended mileage from GM I decided to change it this week at only 2900 miles.
I was shocked at the condition of the oil that came out.
It was also low as well.
Someone I know took his c7 to a well known dealer who just topped his up without draining.
Terrible service imo.![](https://thumbsnap.com/sc/3qzRjm3t.jpg[/img]</a> <a href="https://thumbsnap.com/XBSY3nSu" Target="_blank" rel="nofollow">[img]https://thumbsnap.com/sc/XBSY3nSu.jpg)
Recently purchased a 2019 grand sport with only 2.5k
After reading about needing to change the differential oil before the recommended mileage from GM I decided to change it this week at only 2900 miles.
I was shocked at the condition of the oil that came out.
It was also low as well.
Someone I know took his c7 to a well known dealer who just topped his up without draining.
Terrible service imo.
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