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 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6FACTORY OEM SERVICE PROCEDURE
Quick Lookups: Fluids
| FLUID CAPACITIES | |||||||
|---|---|---|---|---|---|---|---|
| Fluid Type | Application | Standard | Metric | Fluid Spec | Note | S/H | |
| Air Cond Compressor Oil | w/o Rear AC | 8.00 OZS. | 0.23 L | PAG 46 | S | ||
| Air Cond Compressor Oil | w/Rear A/C | 11.00 OZS. | 0.32 L | PAG 46 | S | ||
| Air Cond Refrigerant | Front | 2.00 LBS. | 0.9 KG | R-134a | S | ||
| Air Cond Refrigerant | Rear | 3.00 LBS. | 1.36 KG | R-134a | S | ||
| Automatic Transmission Fluid | Trans Mfr CD 4L80E/MT1 | Drain and Refill | 7.70 QTS. | 7.28 L | Automatic Transmission Fluid DEXRON VI | All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. | S |
| Automatic Transmission Fluid | Trans Mfr CD 4L80E/MT1 | Overhaul | 13.50 QTS. | 12.77 L | Automatic Transmission Fluid DEXRON VI | All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. | S |
| Brake Fluid | N/A | N/A | DOT 3 Brake Fluid | S | |||
| Differential Gear Oil | Front Axle 7.25" | 1.27 QTS. | 1.2 L | SAE 75W-90 Synthetic Gear Oil | S | ||
| Differential Gear Oil | Rear Axle 10.5" | 3.31 QTS. | 3.13 L | SAE 75W-90 Synthetic Gear Oil | S | ||
| Differential Gear Oil | Rear Axle 8.6" | 2.15 QTS. | 2.03 L | SAE 75W-90 Synthetic Gear Oil | S | ||
| Differential Gear Oil | Rear Axle 9.75" | 3.13 QTS. | 2.96 L | SAE 75W-90 Synthetic Gear Oil | Rear Axle (Steerable): Synthetic Gear Oil; use ONLY GM Part No.12378557. DO NOT add Friction Modifier. | S | |
| Engine Coolant | 6.6L Eng | Front & Rear Heater or A/C Only | 22.50 QTS. | 21.29 L | 50/50 mixture of DEX-COOL and clean, drinkable water | All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. | S |
| Engine Coolant | 6.6L Eng | Front & Rear Heater or A/C Plus Fuel Operated Heater (FOH) | 23.50 QTS. | 22.23 L | 50/50 mixture of DEX-COOL and clean, drinkable water | All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. | S |
| Engine Coolant | 6.6L Eng | Front Heater or A/C Only | 21.00 QTS. | 19.87 L | 50/50 mixture of DEX-COOL and clean, drinkable water | All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. | S |
| Engine Coolant | 6.6L Eng | Front Heater or A/C Plus Fuel Operated Heater (FOH) | 22.00 QTS. | 20.81 L | 50/50 mixture of DEX-COOL and clean, drinkable water | All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. | S |
| Engine Oil | 6.6L Eng | w/Filter | 10.00 QTS. | 9.46 L | API - SAE 15W-40 | Use ONLY engine oil that have designation: CJ-4. Designation CJ-4 can appear either alone or in combination with other API designations such as API - CJ-4/SL. SAE 15W-40 is best for the vehicle. When it is very cold, below 0°F (-18°C), use SAE 5W-40 to improve cold starting. These numbers on the oil container show its viscosity, or thickness. Do not use other viscosity oils such as SAE 10W-30, SAE 10W-40, or SAE 20W-50. | S |
| Engine Oil | 6.6L Eng | w/o Filter | 9.20 QTS. | 8.7 L | API - SAE 15W-40 | Use ONLY engine oil that have designation: CJ-4. Designation CJ-4 can appear either alone or in combination with other API designations such as API - CJ-4/SL. SAE 15W-40 is best for the vehicle. When it is very cold, below 0°F (-18°C), use SAE 5W-40 to improve cold starting. These numbers on the oil container show its viscosity, or thickness. Do not use other viscosity oils such as SAE 10W-30, SAE 10W-40, or SAE 20W-50. | S |
| Fuel Tank | 31.00 GALS. | 117.34 L | S | ||||
| Power Steering Fluid | N/A | N/A | GM Power Steering Fluid | GM Part No. 89021184. | S | ||
| Transfer Case Fluid | 1.50 QTS. | 1.41 L | Manual Transmission Fluid | GM Part No. 88861800. | S | ||
| Windshield Washer Fluid | N/A | N/A | Optikleen Windshield Washer Fluid | Follow the Manufacturer's Instructions for the mixture ratio. | S | ||
Factory Service Tools
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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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