GMC 2003 GMT560 T-Series Owner's Manual page 232

Manual Transmission
RT8709B
FS5406
FS6406
Automatic Transmission
2000 Series
2400 Series
MD 3060 P
MD 3560 P
*Add two pints (one liter) when changing spin-on or remote filter.
Capacities (volumes) are approximate. For manual transmissions, the correct fluid level is to the bottom of the fluid
fill plug opening. The fluid capacity will vary, due to the angle of the transmission, with the vehicle. For automatic
transmissions, see the Allison Automatic Transmission Operator's Manual for fluid check and maintenance
information.
5-76
Transmission Fluid Capacity
Application
Capacities
English
25.1 pints
18.4 pints
18.4 pints
35.0 pints
35.0 pints
52.0 pints
52.0 pints
Metric
11.8 liters
8.7 liters
8.7 liters
13.5 liters*
13.5 liters*
24.6 liters
24.6 liters