2020 Chevrolet Silverado 1500 maintenance schedule

Written in plain English and reviewed by the eli5cars editorial team · Last reviewed June 2026

4.3L V6 (285 hp), 2.7L turbocharged 4-cylinder (310 hp), 5.3L V8 (355 hp), 6.2L V8 (420 hp), 3.0L Duramax turbodiesel inline-6 (277 hp)Work TruckCustomCustom Trail BossMSRP $29,300

Jump to a mileage milestone:

30k miles 60k miles 90k miles 120k miles

Full service timeline

Mileage	Service items	Details
8k mi	Engine oil and filter change — dexos1 Gen 2 full synthetic (GM mandated for all 2020 Silverado engines; 0W-20 for 2.7T and 5.3L/6.2L V8; 0W-20 for 4.3L V6; 6.6L diesel uses dexos2 15W-40) — interval driven by GM Oil Life Monitor (OLM), not a fixed mileage; 7,500 mi is the maximum if OLM has not alerted earlier Reset GM Oil Life Monitor after oil change Inspect tire pressure and adjust to door-placard spec Inspect all exterior lights
15k mi	Engine oil and filter change per OLM (dexos1 Gen 2 full synthetic) Tire rotation — rear-wheel-drive: front-to-rear straight swap; 4WD models: cross-axle rotation Inspect brake pads, rotors, and calipers front and rear Inspect all fluid levels: coolant, power steering (hydraulic where applicable), brake fluid, windshield washer Inspect cabin air filter — replace if dusty or restricted Inspect driveshaft u-joints (4WD models)
30k mi	Engine oil and filter change per OLM (dexos1 Gen 2 full synthetic) Tire rotation Replace cabin air filter Replace engine air filter Inspect spark plugs — do not replace at 30k (iridium plugs factory spec ~97,500 mi; AC Delco Professional Iridium recommended) Inspect 4WD front axle actuator and front differential (4WD models — Mobil 1 75W-90 synthetic gear lube) Inspect transfer case fluid (4WD models — Auto-Trak II or Dexron VI depending on BorgWarner unit) Inspect rear differential fluid (Mobil 1 75W-90 synthetic; 8.5-inch or 9.5-inch ring gear) Inspect fuel injectors and throttle body Inspect coolant hoses and serpentine belt	View →
60k mi	Engine oil and filter change per OLM (dexos1 Gen 2 full synthetic) Tire rotation Replace cabin air filter Replace engine air filter Replace spark plugs — iridium (5.3L L84/L82 and 6.2L L87: AC Delco 41-162; 4.3L EcoTec3 V6: same iridium spec — factory interval 97,500 mi but many owners replace at 60k for preventive value) Replace rear differential fluid — Mobil 1 synthetic 75W-90 (GM limited-slip additive required if Eaton Locker or G80 Gov-Lok rear axle equipped) Replace transfer case fluid (4WD models — Auto-Trak II or Dexron VI) Replace front differential fluid (4WD models) Inspect coolant — DEX-COOL extended-life orange coolant; first change at 5 years/150k miles per GM, but inspect for contamination at 60k Inspect brake fluid condition — replace if moisture-contaminated Inspect transmission fluid — 8-speed 8L80 or 8L45: GM recommends inspect at 60k; Allison 10L90 on 6.2L: same Inspect and lubricate all grease fittings (ball joints, tie rod ends — if equipped with Zerk fittings; many 2020 models have sealed joints)	View →
90k mi	Engine oil and filter change per OLM (dexos1 Gen 2 full synthetic) Tire rotation Replace spark plugs — iridium AC Delco (factory interval 97,500 mi; replace now if not done at 60k) Replace coolant — DEX-COOL; flush and refill with 50/50 premix Replace brake fluid — DOT 3 Replace rear differential fluid Replace transfer case fluid (4WD models) Inspect serpentine belt for cracking, glazing, or fraying Inspect all suspension components: ball joints, control arm bushings, sway bar links and end links Inspect wheel bearings front and rear (sealed hub assemblies on 2020 Silverado; press-fit replacements) Inspect trailer hitch wiring and receiver (if equipped)	View →
120k mi	Engine oil and filter change per OLM (dexos1 Gen 2 full synthetic) Tire rotation Replace spark plugs (second set at 120k — iridium AC Delco; 5.3L takes 8 plugs, 6.2L takes 8 plugs) Replace coolant — DEX-COOL flush Replace serpentine drive belt Replace rear differential fluid Replace transfer case fluid (4WD models) Replace front differential fluid (4WD models) Inspect transmission fluid — 8L80/8L45: fluid should be pink/light red; replace if dark or burnt Full brake inspection: pads, rotors, calipers, brake lines, master cylinder Inspect fuel injectors — carbon deposit buildup common on direct-injection 5.3L and 6.2L EcoTec3 after 100k; top-engine cleaning recommended Inspect HVAC system: blower motor, heater core hose connections, A/C compressor operation	View →

Common symptoms for this vehicle

Check engine light on? Get a free code scan

If your check engine light is on, most auto-parts stores (AutoZone, O'Reilly, Advance) will read the code for FREE — no purchase required, just walk in. Bring the code back here and look it up at eli5cars.com/obd2 for the plain-English explanation.

Note: a scan only helps when there's an active fault code. For purely mechanical symptoms (noises, vibrations, leaks), a scan may show nothing — the suspects listed above are your starting point.