Air Conditioning Refrigerant R134a

For the air conditioning system refrigerant charge amount, see the refrigerant caution label located under the hood. See your dealer/retailer for more information.

Cooling System - C4/C5 Models

• 6.6L V8 Automatic Transmission

27.9 qt

26.4 L

• 8.1L V8 Automatic Transmission

29.8 qt

28.2 L

• 8.1L V8 Manual Transmission

30.1 qt

28.5 L

Cooling System - C6/C7/C8 Automatic Transmission

• 7.2L L6 Engine

32.0 qt

30.2 L

• Isuzu 6H Engine (207 - 275 hp)

34.8 qt

32.9 L

• Isuzu 6H Engine (300 hp)

33.9 qt

32.1 L

• 8.1L V8 Engine

32.5 qt

30.8 L

Cooling System - C6/C7/C8 Manual Transmission

• 7.2L L6 Engine

30.4 qt

28.8 L

• 7.2L L6 Engine with A/C and Increased Cooling

33.9 qt

32.1 L

• Isuzu 6H Engine (207-275 hp)

32.7 qt

31.0 L

• Isuzu 6H Engine (207-275 hp) with A/C and Increased Cooling

35.9 qt

34.0 L

• Isuzu 6H Engine (300 hp)

36.0 qt

34.1 L

• Isuzu 6H Engine (300 hp) with A/C and Increased Cooling

36.0 qt

34.1 L

• 8.1L V8 Engine

33.3 qt

31.5 L

• 8.1L V8 Engine with A/C and Increased Cooling

34.9 qt

33.0 L

Engine Oil with Filter

• 6.6L V8 Engine

14.6 qt

13.8 L

• 7.2L L6 Caterpillar® C7 Engine

30.0 qt

28.4 L

• Isuzu 6H¹ Engine

23.8 qt

22.5 L

• 8.1L V8 Engine

10.0 qt

9.4 L

Check fill level on the oil indicator after initial fill to make sure it is actually full. Oil level may vary depending on vehicle option content.

¹Additional oil is required with auxiliary oil filter systems. Make sure to add enough extra oil to fill the auxiliary oil filter system. For vehicles equipped with the LUBERFINER 750-C, add 14 quarts (13.25 L).

Fuel Capacity - C4/C5 Models

• Standard (Mid-Mounted)

25 gal

94.6 L

• Optional¹ (Dual-Tank) (Mid-Mounted)

40 gal

151.4 L

• Optional (Mid-Mounted)

32 gal

121.1 L

• Optional (Side-Mounted)

35 gal

132.5 L

• Optional (Mid-Mounted)

40 gal

151.4 L

• Optional (Mid-Mounted)

60 gal

227.1 L

• Optional (Mid-Mounted)

80 gal

302.8 L

¹One 25-gallon (94.6 L) tank and one 15-gallon (56.8 L) tank

Fuel Capacity - C6/C7/C8 Models

• Optional

35 gal

132.4 L

• Standard

50 gal

189.2 L

• Optional

50 gal

189.2 L

• Optional¹ (Dual Tanks)

70 gal

264.8 L

• Optional² (Dual Tanks)

75 gal

283.8 L

• Optional³ (Dual Tanks)

100 gal

378.5 L

¹Two 35-gallon (132.4 L) tanks

²One 25-gallon (94.6 L) tank and one 50-gallon (189.2 L) tank

³Two 50-gallon (189.2 L) tanks

Front 4WD Axle (G38)

7.0 pt

3.6 L

Rear Axle - Single Speed

• 80 (GL4)

10.0 pt

4.7 L

• 19060D (HPM), 19060S (HPK), 21060D (HPN), 21060S (HPP), 22060S (HPG)

31.0 pt

14.7 L

• 23090S (HPT)

42.5 pt

20.1 L

• 23105D (HNB), 23105S (HNA)

51.0 pt

24.1 L

• 26105S (HPA)

51.0 pt

24.1 L

• S110 (HD2) and S130 (HD1)

15.0 pt

7.1 L

Rear Axle - Tandem

• DS344 (front) (HPI)

34.0 pt

16.1 L

• DS344 (rear) (HPI)

31.0 pt

14.7 L

• DS404 (HPE), DS404P (HPJ) (front/rear unit)

32.0 pt

15.1 L

• RSH44 (front/ rear unit) (HP3)

29.0 pt

13.7 L

Rear Axle - Two-Speed

• 19060T (HPL), 22060T (HPH)

38.0 pt

18.0 L

• 21060T (H15)

38.0 pt

18.0 L

• 23082T (H25)

44.0 pt

20.8 L

• 26080T (GJ4)

44.0 pt

20.8 L

Transfer Case (Four-Wheel Drive)

4.0 pt

1.9 L

Transmission Fluid, Automatic

• 3000 RDS and EVS, and 3500 RDS and EVS with PTO Provision

59.0 pt

28.1 L

• 3000 RDS and EVS, and 3500 RDS and EVS without PTO Provision

52.0 pt

24.6 L

• 1000 HS, RDS, MH, PTS and EVS, 2200 HS, RDS, MH, PTS and EVS, 2500 HS and RDS, and 2300 HS and RDS

35.0 pt

16.5 L

Add 2 pints (1 L) when changing spin-on or remote filter.

See the Allison® Automatic Transmission Operator's Manual for fluid check and maintenance information.

Transmission Fluid, Manual

• ES052-7, ES066-7

22.0 pt

10.4 L

• FS5205A

12.5 pt

5.9 L

• FSO8406, FS6305A, FS6305B, FS6406, FS5406A

19.5 pt

9.2 L

• FS4205A, FS4205B

11.5 pt

5.4 L

• RT6609

12.0 pt

5.7 L

• RT8709

26.0 pt

12.3 L

• RT8908LL

28.0 pt

13.2 L

All capacities are approximate. When adding, be sure to fill to the approximate level, as recommended in this manual. Recheck the fluid level after filling.

6.6L V8 DURAMAX®

LMM

Common Rail Fuel System

7.2L L6 Caterpillar® C7

LF6

Hydraulic/Electronic Unit Injector Fuel System

7.8L L6

Isuzu 6H

LF8

Common Rail Fuel System

8.1L V8 VORTEC™

L18

Single Port Fuel Injector Fuel System