2021 Chevrolet Silverado 2500HD Owners Manual - Maintenance Schedule

Maintenance Schedule

Owner Checks and Services

Check the engine oil level. See Engine Oil

0 305.

Once a Month

Check the tire inflation pressures, including the spare. See Tire Pressure 0 341.

Inspect the tires for wear. See Tire Inspection 0 348.

Check the windshield washer fluid level. See Washer Fluid 0 315.

When the CHANGE ENGINE OIL SOON

message displays, have the engine oil and filter changed within the next 1 000 km/ 600 mi. If driven under the best conditions, the engine oil life system may not indicate the need for vehicle service for up to a year. The engine oil and filter must be changed at least once a year and the oil life system must be reset. Your trained dealer technician can perform this work. If the engine oil life system is reset accidentally, service the vehicle within 5 000 km/3,000 mi since the last service. Reset the oil life system when the oil is changed. See Engine Oil Life System 0 307.

When the REPLACE AT NEXT OIL CHANGE

message displays, the engine air filter should be replaced at the next engine oil change. When the REPLACE ENGINE AIR FILTER SOON message displays, the engine air filter should be replaced at the earliest convenience. Reset the engine air filter life system after the engine air filter is replaced. See Engine Air Filter Life System 0 308.

The passenger compartment air filter removes dust, pollen, and other airborne irritants from outside air that is pulled into the vehicle. The filter should be replaced as part of routine scheduled maintenance.

Inspect the passenger compartment air filter every 36 000 km/22,500 miles or two years, whichever comes first. Replace if necessary. More frequent replacement may be needed if the vehicle is driven in areas with heavy traffic, areas with poor air quality, or areas with high dust levels. Replacement may also be needed if there is a reduction in air flow, excessive window fogging, or odors.

When the vehicle is used with the PTO equipment or used in a way that requires extended idle time, one hour of use shall be deemed the same as 53 km (33 mi).

See Driver Information Center (DIC) (Base Level) 0 119 or

Driver Information Center (DIC) (Midlevel and Uplevel) 0 120 for hourmeter, if equipped.

The air conditioning system requires maintenance every seven years. This service requires replacement of the desiccant to help the longevity and efficient operation of the air conditioning system. This service can be complex. See your dealer.

Rotate the tires, if recommended for the vehicle, and perform the following services. See Tire Rotation 0 348.

Check engine oil level and oil

life percentage. If needed, change engine oil and filter, and reset oil life system. See Engine Oil 0 305 and

Engine Oil Life System 0 307.

If equipped with the engine air filter life system, check the air filter

life percentage. If necessary, replace the engine air filter and reset the engine air filter life system. See Engine Air Filter Life System 0 308. If the vehicle is not equipped with the engine air filter life system, inspect the engine air cleaner filter. See Engine Air Cleaner/Filter 0 309.

Check engine coolant level. See Cooling System 0 310.

Check windshield washer fluid level. See

Washer Fluid 0 315.

Check tire inflation pressures, including the spare. See Tire Pressure 0 341.

Inspect tire wear. See Tire Inspection

0 348.

Visually check for fluid leaks.

Inspect brake system. See Exterior Care

0 373.

Visually inspect steering, suspension, and chassis components for damage, including cracks or tears in the rubber boots, loose or missing parts, or signs of wear at least once a year. See Exterior Care 0 373.

If equipped with grease fittings, lubricate the suspension and steering components every oil change.

Inspect power steering for proper attachment, connections, binding, leaks, cracks, chafing, etc.

Visually inspect drive shafts for excessive wear, lubricant leaks or damage including: tube dents, cracks, constant velocity joint or universal joint looseness, cracked or missing boots, loose or missing boot clamps, center bearing excessive looseness, missing or loose fasteners.

Check restraint system components. See

Safety System Check 0 56.

Visually inspect fuel system for damage or leaks.

Visually inspect exhaust system and nearby heat shields for loose or damaged parts.

Lubricate body components. See Exterior Care 0 373.

Check starter switch. See Starter Switch Check 0 321.

Check automatic transmission shift lock control function. See Automatic Transmission Shift Lock Control Function Check 0 322.

Check ignition transmission lock. See

Ignition Transmission Lock Check 0 322.

Check parking brake and automatic transmission park mechanism. See Park Brake and P (Park) Mechanism Check

0 322.

Check accelerator pedal for damage, high effort, or binding. Replace if needed.

Visually inspect gas strut for signs of wear, cracks, or other damage. Check the hold open ability of the strut. If the hold open is low, service the gas strut. See Gas Strut(s) 0 323.

Inspect sunroof track and seal, if equipped. See Sunroof 0 40.

Verify spare tire key lock operation and lubricate as needed. See Tire Changing 0 356.

Visually inspect the spare tire to ensure that it is tightly stowed under the vehicle. Push, pull, and try to turn the tire. If the spare tire moves, tighten as necessary.

See Tire Changing 0 356.

Additional Required Services

Footnotes — Maintenance Schedule Additional Required Services - Normal

Or every four years, whichever comes first. If driving in dusty conditions, inspect the filter at each oil change or more often as needed. See Engine Air Cleaner/Filter

0 309.

Or every two years, whichever comes first. More frequent replacement may be needed if the vehicle is driven in areas with heavy traffic, poor air quality, areas with high dust levels or are sensitive to environmental allergens. Filter replacement may also be needed if you notice reduced airflow, windows fogging up, or odors. Your local GM Service location can help you determine when it is the right time to replace your filter.

Visually check all fuel and vapor lines and hoses for proper attachment, connection, routing, and condition.

Do not directly power wash the transfer case and/or front/rear axle output seals. High pressure water can overcome the seals and contaminate the fluid. Contaminated fluid will decrease the life of the transfer case and/or drive axles and should be replaced.

Or every five years, whichever comes first. See Cooling System 0 310.

Or every 10 years, whichever comes first. Inspect for fraying, excessive cracking,

or damage; replace, if needed.

Replace brake fluid every five years. See

Brake Fluid 0 317.

Or every 12 months, whichever comes first. See Wiper Blade Replacement 0 322.

Or every 10 years, whichever comes first. See Gas Strut(s) 0 323.

Replace air conditioning desiccant every seven years.

Footnotes — Maintenance Schedule Additional Required Services - Severe

Or every four years, whichever comes first. If driving in dusty conditions, inspect the filter at each oil change or more often as needed. See Engine Air Cleaner/Filter

0 309.

Or every two years, whichever comes first. More frequent replacement may be needed if the vehicle is driven in areas with heavy traffic, poor air quality, areas with high dust levels or are sensitive to environmental allergens. Filter replacement may also be needed if you notice reduced airflow, windows fogging up, or odors. Your local GM Service location can help you determine when it is the right time to replace your filter.

Visually check all fuel and vapor lines and hoses for proper attachment, connection, routing, and condition.

Do not directly power wash the transfer case and/or front/rear axle output seals. High pressure water can overcome the seals and contaminate the fluid. Contaminated fluid will decrease the life of the transfer case and/or drive axles and should be replaced.

Or every five years, whichever comes first. See Cooling System 0 310.

Or every 10 years, whichever comes first. Inspect for fraying, excessive cracking,

or damage; replace, if needed.

Replace brake fluid every five years. See

Brake Fluid 0 317.

Or every 12 months, whichever comes first. See Wiper Blade Replacement 0 322.

Or every 10 years, whichever comes first. See Gas Strut(s) 0 323.

Replace air conditioning desiccant every seven years.

Vehicles with Dual Wheels: Check dual wheel nut torque at 160, 1 600, and 10 000 km (100, 1,000, and 6,000 mi) of

driving. Repeat this service whenever a tire/wheel is serviced or removed.