Fluid TypeApplicationApplication Cont'dStandardMetricFluid SpecNote
Automatic Transmission FluidTrans Mfr CD 1000/MW7 and 1000/M74Drain and Refill7.40 QTS.7 LAutomatic Transmission Fluid DEXRON VIAll capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling.
Brake FluidN/AN/ADOT 3 Brake Fluid
Differential Gear OilFront Axle 8.25"1.51 QTS.1.4 LFront Axle (1500 Series 4WD): SAE 80W-90 Gear Oil. Front Axle (1500, 2500 HD, and 3500 HD Series): SAE 75W-90 Synthetic Gear Oil.
Differential Gear OilFront Axle 9.25"1.83 QTS.1.7 LFront Axle (1500 Series 4WD): SAE 80W-90 Gear Oil. Front Axle (1500, 2500 HD, and 3500 HD Series): SAE 75W-90 Synthetic Gear Oil.
Differential Gear OilRear Axle 10.5"2.75 QTS.2.6 LSAE 75W-90 Synthetic Gear Oil
Differential Gear OilRear Axle 11.5"3.17 QTS.3 LSAE 75W-90 Synthetic Gear Oil
Differential Gear OilRear Axle 8.6"2.15 QTS.2 LSAE 75W-90 Synthetic Gear Oil
Differential Gear OilRear Axle 9.5"2.75 QTS.2.6 LSAE 75W-90 Synthetic Gear Oil
Differential Gear OilRear Axle 9.75"3.00 QTS.2.8 LSAE 75W-90 Synthetic Gear OilRear Axle (Steerable): Synthetic Gear Oil; use ONLY GM Part No.12378557. DO NOT add Friction Modifier.
Engine Oil6.6L Engw/Filter10.00 QTS.9.5 LAPI - SAE 15W-40Use ONLY engine oils that have one of these designations: CI 4 or CH 4 for DURAMAX diesel engines. When it is very cold, below 0Deg. F (-18Deg. C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
Engine Oil6.6L Engw/o Filter9.20 QTS.8.7 LAPI - SAE 15W-40Use ONLY engine oils that have one of these designations: CI 4 or CH 4 for DURAMAX diesel engines. When it is very cold, below 0Deg. F (-18Deg. C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
Fuel Tank2500 HD26.00 GALS.98.4 L
Fuel Tank3500 HDFront27.00 GALS.102.2 L
Fuel Tank3500 HDRear23.00 GALS.87.1 L
Power Steering FluidN/AN/AGM Power Steering FluidGM Part No. 89021184.
Transfer Case FluidT/Case Mfr CD 1625-6/NQF1.60 QTS.1.5 LAutomatic Transmission Fluid DEXRON VI
Transfer Case FluidT/Case Mfr CD 3023-4/NQH1.60 QTS.1.5 LAutomatic Transmission Fluid DEXRON VI
T/Case Mfr CD 263C2.00 Quarts1.9 LManual Transmission Fluid
Windshield Washer FluidN/AN/AOptikleen Windshield Washer FluidFollow the Manufacturer's Instructions for the mixture ratio.