2015 Original trans fluid

[brian65]

Bought a 2015 LTZ with V6 couple weeks ago 1 owner. 150k miles on it very nice overall condition. Asked a few questions about service done. Engine oil done regularly. Coolant done at 90k. Transfer case replaced with GM unit at 115k.

Now for question. Transmission never been serviced. Original fluid from factory No slippage. Shifts fine but 150k miles. Do I let it go & see how long it goes or change it?

 

[PoManNox]

I would do spill and fills with some drive time in between.

I know people say new fluid is going to ruin a "neglected" transmission, but IMO this theory stems from people trying to fix an already existing transmission problem with new fluid.

 

[brian65]

Unbelievably with it having 150k miles it has no shifting issues despite many stating every 30-50k changing it. Still has original plugs & coil