2.8L Duramax Maintenance Schedule & Service Guide

Colorado/Canyon 2.8L Diesel Maintenance Intervals & Service Info

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.

2.8L Duramax Maintenance Schedule

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

Check filter condition at oil change intervals, replace as necessary

Change engine oil & oil filter

As indicated by "CHANGE ENGINE OIL SOON" message

Do not exceed 7,500 miles/1 year between oil change intervals

Replace fuel filter(s)

Pickup

37,500 miles or 2 years

Or as indicated by "CHANGE FUEL FILTER" message. Pickups have dual fuel filter elements, vans have a single fuel filter; more frequent replacement recommended if using biodiesel.

Van

30,000 miles or 2 years

Replace serpentine belt

150,000 miles

Check belt condition at oil change intervals, replace as necessary; serpentine belt will likely need to be replaced before 150,000 mile interval

Service engine cooling system

150,000 miles or 5 years

More frequent cooling system service recommended after initial 150,000 mile/5 year service

Replace engine timing belt

150,000 miles

Failure to replace timing belt may result in catastrophic engine failure

Replace automatic transmission filter & fluid

Normal conditions

No service interval provided

GM does not provide a "normal" transmission service interval for 6 or 8 speed transmissions; recommend adhering to "severe" service category and servicing transmission every 45,000 miles [1]

Severe conditions

45,000 miles

Replace transfer case fluid

Normal conditions

97,5000 miles

Replace transfer case fluid immediately if transfer case is submerged in water; water intrusion probable

Severe conditions

45,000 miles

Replace front differential fluid

Replace immediately if differential/axle is submerged in water; water intrusion probable

No service interval provided by GM; recommend servicing at 100,000 miles; synthetic oil advised

Replace rear differential fluid

Add diesel exhaust fluid (DEF)

As necessary or indicated that fluid level is low

Top off at oil changes if fluid is not filled between oil change intervals

[1] Most vehicles will meet "severe" service criteria at some point, thus we recommend that all vehicles service the transmission at 45,000 mile intervals.

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

Type

Oil/Fluid Specification

Capacity [1]

Engine oil [2]

Ambient temp > -20° F

SAE 5W-30

6.0 quarts w/ filter change

Ambient temp < -20° F

SAE 0W-40

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)

Colorado/Canyon

11.1 quarts

Express/Savana

14.4 - 16.9 quarts

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)

2.0 quarts

Front differential gear oil

SAE 75W-90 (synthetic recommended)

1.35 quarts

Rear differential gear oil

SAE 75W-90 (synthetic recommended)

1.6 quarts

Diesel exhaust fluid (DEF)

ACDelco diesel exhaust fluid 10-4023 [4]

Colorado/Canyon

5.4 gallons

Express/Savana

5.5 gallons

[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 Max Duty 5W-30 synthetic engine oil, specifically designed for diesel engine applications.

[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 under any circumstances.

 

2.8L Duramax Belt Routing Diagram (Pickups & Vans)

2.8L Duramax belt routing diagram

2.8L Duramax serpentine belt routing diagram, Colorado/Canyon pickup and Express/Savana van models