2.8L Duramax Maintenance Schedule
Service procedures that are required at a declared vehicle mileage OR time interval should be performed at the point which either the mileage OR time interval is reached (whichever should come first). A vehicle may fall under the "severe" or "special" service category if any of the following is true:
• Vehicle is idled excessively (> 10 minutes of idling in a 60 minute period), frequently driven in heavy stop-and-go traffic, or is used regularly for short trips that prevent the engine from reaching normal operating temperature.
• Vehicle is operated in extremely hot or cold weather conditions.
• Vehicle is used to tow a trailer or haul heavy cargo.
• Vehicle is operated off-road or in dusty conditions.
Note - unless otherwise noted, service intervals apply to both Colorado/Canyon pickups and Express/Savana van models.
| Service Procedure | Recommended Interval | Notes/Remarks | |
| Replace engine air filter | 45,000 miles or 4 years | [1] | |
| Change engine oil & oil filter | As indicated by "CHANGE ENGINE OIL SOON" message | [2] | |
| Replace fuel filter(s) | Pickup | 37,500 miles or 2 years | [3] |
| Van | 30,000 miles or 2 years | ||
| Replace serpentine belt | 150,000 miles | [1] | |
| Service engine cooling system | 150,000 miles or 5 years | [4] | |
| Replace engine timing belt | 150,000 miles | --- | |
| Replace automatic transmission filter & fluid | Normal conditions | No service interval provided | [5] |
| Severe conditions | 45,000 miles | ||
| Replace transfer case fluid | Normal conditions | 97,5000 miles | [6] |
| Severe conditions | 45,000 miles | ||
| Replace front differential fluid | Replace immediately if differential/axle is submerged in water; water intrusion probable | [6], [7] | |
| Replace rear differential fluid | |||
| Add diesel exhaust fluid (DEF) | As necessary or indicated that fluid level is low | --- | |
[1] Inspect at oil change intervals and replace as necessary.
[2] Do not exceed 7,500 miles/12 months between oil changes.
[3] Replace fuel filter(s) at required intervals OR as indicated when prompted by "CHANGE FUEL FILTER" message in the instrument panel display. More frequent fuel filter replacements are recommended when using biodiesel/biodiesel blends. Pickups have two fuel filter elements, vans have a single fuel filter.
[4] Recommend more frequent cooling system service after initial 150,000 mile/5 year service.
[5] Transmission service interval absent when vehicle falls under "normal" service category; recommend adhering to the "severe" service category and servicing transmission every 45,000 miles.
[6] Replace fluid immediately if submerged in water; water intrusion probable.
[7] No service interval provided by GM; recommend servicing at 100,00 mile intervals. Synthetic gear oil advised.
2.8L Duramax Service Part Numbers
Note - unless otherwise noted, part numbers are valid for Colorado/Canyon pickups and Express/Savana van models. Part numbers have been verified through the 2019 model year.
| Part Description | GM/ACDelco Part Number(s) | |
| Engine air filter | Colorado/Canyon | ACDelco A3216C |
| Express/Savana | ACDelco A3221C | |
| Engine oil filter | Colorado/Canyon | ACDelco PF2262G (PF69) |
| Express/Savana | ACDelco PF2267G | |
| Oil filter cap | Colorado/Canyon | ACDelco 55595790 |
| Express/Savana | ACDelco 55484645 | |
| Oil pan drain plug | GM 11562588 (includes gasket) | |
| Oil fill cap | ACDelco FC271 | |
| Fuel filter | Colorado/Canyon | ACDelco TP1007 (sold in pairs w/ o-ring seals) |
| Express/Savana | ACDelco TP2016 | |
| Serpentine belt | Colorado/Canyon | ACDelco 6K854A |
| Express/Savana | ACDelco 12662028 | |
| Glow plug | ACDelco 16G | |
| Thermostat | ACDelco 12642691 (sold as assembly w/ thermostat housing) | |
| Thermostat housing gaskets | Thermostat to housing/outlet fitting | ACDelco 12650487 |
| Thermostat housing to engine | ACDelco 12650486 | |
| Coolant overflow tank | Colorado/Canyon | ACDelco 84388367 |
| Express/Savana | ACDelco 84225911 | |
| Coolant overflow tank cap | ACDelco 13502353 | |
| Upper radiator hose | Colorado/Canyon | ACDelco 23385947 |
| Express/Savana | ACDelco 84185766 | |
| Lower radiator hose | Colorado/Canyon | N/A |
| Express/Savana | ACDelco 84440071 | |
| Front differential gasket | Colorado/Canyon | ACDelco 23471893 |
| Express/Savana | N/A | |
| Rear differential gasket | Colorado/Canyon | ACDelco 23490354 |
| Express/Savana | ACDelco 26063649 | |
| Automatic transmission filter | Colorado/Canyon | ACDelco 24236933 |
| Express/Savana | ACDelco TF922 | |
| Transmission pan gasket | Colorado/Canyon | ACDelco 24225800 |
| Express/Savana | ACDelco 24260071 | |
2.8L Duramax Colorado/Canyon & Express/Savana Fluid Specifications & Capacities
| Component | Oil/Fluid Specification | Capacity [1] | |
| Engine oil [2] | Ambient temp > -20° F | SAE 5W-30 meeting GM dexos2 specifications Recommend Amsoil 5W-30 synthetic diesel oil, meets dexos2 spec |
6.0 quarts w/ filter change |
| Ambient temp < -20° F | SAE 0W-40 meeting GM dexos2 specifications | ||
| Engine coolant [3] | GM DEX-COOL extended life engine coolant (orange) ACDelco 10-101 concentrated engine coolant (GM 12346290) ACDelco 10-5027 premixed engine coolant (GM 12378390) |
11.1 quarts (Colorado/Canyon) |
|
| 14.4 - 16.9 quarts (Express/Savana) |
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| Automatic transmission fluid | Colorado/Canyon w/ 6 spd | GM DEXRON VI ATF (ACDelco 10-9243) | ~ 6.7 quarts service refill capacity |
| Express/Savana w/ 8 spd | GM DEXRON HP ATF | ||
| Transfer case fluid | GM DEXRON VI ATF (ACDelco 10-9243) Recommend Amsoil FE Synthetic ATF |
2.0 quarts | |
| Front differential gear oil | SAE 75W-90 gear oil Recommend Amsoil Severe Gear 75W-90 synthetic gear oil |
1.35 quarts | |
| Rear differential gear oil | 1.6 quarts | ||
| Diesel exhaust fluid (DEF) | ACDelco diesel exhaust fluid 10-4023 [4] | 5.4 gallons (Colorado/Canyon) |
|
| 5.5 gallons (Express/Savana) |
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[1] Capacities are nominal; always fill to appropriate dipstick marker, fill plug level, or other applicable fluid level indicator. Oil and fluid levels should be verified before and after driving vehicle.
[2] SAE 5W-30 motor oil preferred within temperature range. SAE 0W-40 required if ambient temperature is expected to drop below -20° F. Recommend Amsoil 5W-30 synthetic diesel oil, specifically designed for diesel engine applications and meets GM dexosD, dexos2 specifications.
[3] Concentrated engine coolant must be diluted 50/50 with distilled water. Do NOT dilute premixed engine coolant. Cooling system capacity on Express/Savana vans depends on heater configuration and optional equipment.
[4] Or other acceptable diesel exhaust fluid; do NOT attempt to dilute DEF with a foreign substance under any circumstances.
2.8L Duramax Belt Routing Diagram
