What fluid should you use when changing your 6-speed manual transmission fluid?

refer to your owners manual,page 11-13. It is not necessary to check the manual transmission fluid level.A transmission fluid leak is the only reason for fluid loss. If a leak occurs, take the vehicle to a "dealer" for service. Have it repaired as soon as possible. You may also have the fluid level checked by your dealer when the oil is changed. suggest staying away from Valvoline,Jiffy Lube,Quick Lube places,special procedure for doing this. if you have no owners manual,copy and paste the link below for free owners manual download. it is your best friend as far as your vehicle is concerned! and yes it is ATF as you will see in the manual.... https://justgivemethedamnmanual.com/cadillac/2013-cadillac-cts-owners-manual/