GMC C-Series 2001 Owner's Manual page 276

Transmission Capacity
Capacities (volumes) shown are approximate. For
manual transmissions, the correct oil level is to the
bottom of the fluid fill plug opening. The oil 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 oil
check and maintenance information.
Manual Transmission
RT6609 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RT8709B . . . . . . . . . . . . . . . . . . . . . . . . . .
FS4205A, FS4205B, FS4205C
FS5205A, FS5205C . . . . . . . . . . . . . . . . . . .
FS5406 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FS6305A, FS6305B . . . . . . . . . . . . . . . . . . .
FS6406 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FS8406 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RT8908LL . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Transmission
AT545 (for oil pan filter change)
MT643 (for oil pan filter change)
MT653 (for oil pan filter change)
*Add two pints (one liter) when changing spin
6-74
Pints (Liters)
12.5 (5.9)
25.1 (11.8)
. . . . . . . . . . 11.1 (5.3)
11.6 (5.5)
18.4 (8.7)
18.4 (8.7)
18.4 (8.7)
18.5 (8.8)
29.1 (13.8)
Pints (Liters)
. . . . . . . 40.0 (19.0)*
. . . . . . 13.0 (24.5)*
. . . . . . 36.0 (17.0)*
-
on filter.
Rear Axle Lubricant Capacity
Single Speed Axle
15040S . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19060S . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21060D . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21060S . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22060S . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22080S . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23080S . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23431 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23105S . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26085P . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26105S . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30105S . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-
Two Speed Axle
15040T . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19060T . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21060T . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22060T . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23080T . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26080T . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Above capacities (volumes) are approximate.
Lubricant, Pints (Liters)
21.0 (10.1)
28.0 (13.0)
28.0 (13.0)
28.0 (13.0)
28.0 (13.0)
40.0 (19.0)
40.0 (19.0)
40.0 (19.0)
56.0 (26.5)
41.0 (19.5)
54.0 (25.5)
54.0 (25.5)
Lubricant, Pints (Liters)
24.0 (11.0)
34.0 (16.0)
34.0 (16.0)
34.0 (16.0)
40.0 (19.0)
40.0 (19.0)