Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2008 Hummer H3 Base, StandardFACTORY OEM SERVICE PROCEDURE
Quick Lookups: Fluids
| FLUID CAPACITIES | |||||||
|---|---|---|---|---|---|---|---|
| Fluid Type | Application | Standard | Metric | Fluid Spec | Note | S/H | |
| Air Cond Compressor Oil | 4.00 OZS. | 0.11 L | PAG 46 | S | |||
| Air Cond Refrigerant | 1.30 LBS. | 0.58 KG | R-134a | S | |||
| Automatic Transmission Fluid | Complete Overhaul | 11.00 QTS. | 10.4 L | Automatic Transmission Fluid DEXRON VI | S | ||
| Automatic Transmission Fluid | Pan Removal | 5.00 QTS. | 4.73 L | Automatic Transmission Fluid DEXRON VI | S | ||
| Brake Fluid | N/A | N/A | DOT 3 Brake Fluid | S | |||
| Differential Gear Oil | Front | 1.53 QTS. | 1.44 L | SAE 75W-90 Synthetic Gear Oil | GM Part No. 89021677. | S | |
| Differential Gear Oil | Rear | 2.11 QTS. | 1.99 L | SAE 75W-90 Synthetic Gear Oil | GM Part No. 89021677. | S | |
| Engine Coolant | 3.7L Eng | 10.00 QTS. | 9.46 L | 50/50 mixture of DEX-COOL and drinkable water | S | ||
| Engine Oil | w/Filter | 6.00 QTS. | 5.67 L | API - SAE 5W-30 | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. | S | |
| Fuel Tank | 23.00 GALS. | 87.06 L | S | ||||
| Manual Transmission Fluid | 2.50 QTS. | 2.36 L | Manual Transmission Fluid | GM Part No. 89021806. | S | ||
| Power Steering Fluid | 1.00 PTS. | 0.47 L | GM Power Steering Fluid | GM Part No. 89021184. | S | ||
| Transfer Case Fluid | 1.60 QTS. | 1.51 L | Automatic Transmission Fluid DEXRON VI | GM Part No. 88861003. | S | ||
| Windshield Washer Fluid | N/A | N/A | Optikleen Windshield Washer Fluid | S | |||
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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