A new TechLink reference chart is now available covering transmission fluid capacities. The 2025 Transmission Fluid Capacities chart can be viewed under the Reference Charts menu or by selecting the chart image below. (Fig. 5)
The chart includes transmissions, RPO, capacity specifications (liters and quarts) and fluid requirements for 2025 Chevrolet, Buick, GMC and Cadillac models.
Fig. 5
For additional information on the appropriate transmission fluid for a particular transmission application, refer to the Service Information. Under the Maintenance Items link at the top of the Service Category Type page, links are provided for the Approximate Fluid Capacities, Fluid and Lubricant Recommendations, and Transmission Fluid Drain and Fill procedures. In addition, the Maintenance Items page provides quick access to a variety of other maintenance information. (Fig. 6)
Fig. 6
More information also can be found in the Owner’s Manual, available from the Vehicle Publication page in Service Information.
– Thanks to Mark Gordon, Mark Kevnick and Marty Leach
So, for the manual 6 speeds in the Cadillacs, part#88861800 called out in service information is actually Dexron lll. It calls it just manual transmission fluid in service information.