How much oil does a Chevy Silverado take?

It depends on the engine. The 4.3L V6 and 5.3L V8 both hold roughly 6 quarts with a filter change; the 6.2L V8 holds about 8 quarts; the 6.6L L8T gas V8 in the HD trucks is around 8 quarts; and the 6.6L Duramax diesel holds roughly 10 quarts. Always confirm the exact capacity for your engine and model year against the owner's manual or under-hood label, and fill to the dipstick — capacity is a starting point, not a substitute for checking the level.

What kind of oil does a Silverado use?

Modern gas Silverados call for a full-synthetic oil that meets GM's dexos1 specification. Older 5.3L and 6.0L V8s commonly ran 5W-30, while newer 5.3L (L84) and 6.2L (L87) engines with cylinder deactivation typically specify 0W-20 dexos1. The 6.6L Duramax diesel uses a dexos2/diesel-rated 15W-40 or 5W-40. Match the exact grade printed on your oil cap or in the manual — the deactivation-equipped engines are sensitive to the wrong viscosity.

How often should I change the spark plugs in my Silverado?

The factory iridium plugs in modern V8s are generally rated for around 100,000 miles. If you tow heavily, run E85, or have a tuned truck, inspecting and replacing them earlier is cheap insurance. Use the ACDelco plug specified for your engine and confirm the gap — many late-model plugs come pre-gapped from the factory and should not be re-gapped by hand.

What battery does a Chevy Silverado 1500 use?

Most half-ton Silverado 1500s use a Group 48 (H6) battery, though some configurations and model years call for a Group 94R. The heavy-duty 2500/3500 trucks — especially the Duramax diesel — use larger batteries and often run two of them. Check your existing battery's group-size stamp or the tray before ordering, since fitment and hold-down clamps vary.

Silverado Maintenance Schedule & Parts Checklist: Fluids, Filters, Plugs & Intervals

Nobody plans to strand a Silverado on the side of the road, but skipped maintenance is how it happens. The good news: these trucks are honest about what they need, and almost all of it is stuff you can stock on a shelf and handle in the driveway. This is the reference page we wish every new Silverado owner had — the fluids, the filters, the intervals, and the specific parts to keep on hand — written the way a 20-year owner would explain it over the open hood.

One rule before any of the numbers below: your owner’s manual and the labels under the hood always win. Capacities and intervals shift between engines and model years, and this page is a starting point to shop and plan from — not a replacement for verifying against your exact VIN.

Engine oil: capacity, type, and interval

Oil is the single most important thing you’ll ever do for this truck, and it’s the easiest to get right.

Capacity, with a filter change (approximate):

4.3L V6 (EcoTec3) — about 6 quarts
5.3L V8 (LM7 / L83 / L84 and family) — about 6 quarts
6.2L V8 (L86 / L87) — about 8 quarts
6.0L V8 (HD, Vortec) — about 7 quarts
6.6L L8T gas V8 (HD) — about 8 quarts
6.6L Duramax diesel — about 10 quarts

Oil type: modern gas engines want a full synthetic that meets GM dexos1. Older 5.3L and 6.0L trucks commonly ran 5W-30; newer 5.3L (L84) and 6.2L (L87) engines with Active Fuel Management / Dynamic Fuel Management cylinder deactivation typically specify 0W-20 dexos1 — and those engines genuinely care about viscosity, so don’t guess. The Duramax runs a diesel-rated 15W-40 or 5W-40 meeting dexos2. The grade on your oil cap is the final word.

Interval: don’t chase a flat mileage number — let the GM Oil Life System call it. It’ll typically ask for a change somewhere in the 3,000–7,500-mile range depending on how you drive, and you should change at least once a year even if the truck sits. Tow-heavy trucks land on the shorter end.

The parts: a quart count of dexos synthetic and the correct ACDelco oil filter for your engine — the PF-series (e.g. PF48 / PF63 depending on year and engine) covers most of the gas V8s. Buy the exact filter for your engine, not “close enough.”

Filters: air, cabin, oil, and fuel

Filters are the definition of cheap insurance. Keep spares in the garage.

Engine oil filter — every oil change. ACDelco PF-series (match to engine).
Engine air filter — inspect at every oil change; typically replace around every 45,000 miles, sooner if you drive dusty gravel roads. A clogged filter quietly costs you throttle response and MPG.
Cabin air filter — commonly every 22,000–45,000 miles, or once a year if you run the AC hard or live somewhere dusty. This is a five-minute glovebox job on most Silverados and the most-ignored filter on the truck.
Fuel filter — gas trucks run a long-life in-tank filter with no scheduled interval, but the Duramax diesel has a serviceable fuel filter that’s critical — plan on roughly every 22,500–25,000 miles (or when the water-in-fuel light asks), and always use a quality kit. A neglected diesel fuel filter is an expensive injector problem waiting to happen.

Spark plugs & ignition (gas engines)

The factory iridium plugs in the EcoTec3 V8s are generally good for around 100,000 miles. Replace them with the ACDelco plug specified for your engine, and here’s the part people miss: many late-model plugs ship pre-gapped and should not be re-gapped by hand — bending the fine iridium electrode can wreck them. If your engine does call for a set gap, the LS-family V8s historically ran around 0.040” — but confirm against your engine’s spec.

If you tow hard, run E85, or have a performance tune, inspect the plugs earlier. Fresh plugs restore smooth idle and crisp throttle far more often than owners expect.

Fluids beyond oil

These are the ones that get forgotten until something expensive breaks. Rough guidance — verify against your manual:

Engine coolant (Dex-Cool) — long-life orange coolant. First change is far out (often around 150,000 miles / 5 years), then more frequently. Check the reservoir level and condition at every oil change.
Automatic transmission fluid — under “normal” duty GM lists a long interval, but under severe / towing duty plan on a service around 45,000–50,000 miles. A truck that tows lives in the severe column, full stop. Use the exact Dexron spec the trans calls for.
Brake fluid — moisture-absorbing by nature; a flush every couple of years keeps the pedal firm and protects the ABS hardware. Pairs naturally with a brake job.
Front/rear differential & transfer case (4WD) — the gear oil the truck is least likely to ever see changed. Service around 45,000 miles under towing/severe use; the rear diff especially earns it if you pull a trailer.
Power steering (hydraulic systems) — inspect level and condition; many later trucks are electric and have none.

Battery, brakes & the wear items

Battery — most 1500s use a Group 48 (H6); some call for a Group 94R. The HD/Duramax trucks run larger batteries, often two. Check the group-size stamp on your current battery before buying, and expect 3–5 years of service life. The full-size truck category is hard on batteries — heat and short trips are the killers.
Brakes — pads and rotors are condition-based, not mileage-based, but inspect at every tire rotation. When it’s time, the brake upgrade guide walks through pad compounds and rotor choices.
Tire rotation — every ~7,500 miles (a natural pairing with an oil change) for even wear. If you’ve changed wheel or tire size, the wheel & tire fitment guide covers what that does to the truck.
Wiper blades, serpentine belt, and accessory pulleys — inspect yearly; a belt is a five-dollar part that leaves you stranded when it lets go.

The shelf-stock checklist

If you own the truck long-term, keep these on hand so maintenance never waits on a parts run:

Oil — the correct dexos grade, a full change’s worth
ACDelco oil filter — the exact one for your engine
Engine air filter and cabin air filter
A set of ACDelco iridium spark plugs (once you’re near the interval)
Wiper blades sized for your truck
Coolant, brake fluid, and washer fluid to top off
(Duramax owners) a spare fuel filter kit — always

Where to buy the parts

New filters, plugs, fluids, batteries, and wipers: Amazon Automotive covers the consumables — start in the maintenance category and the suspension and wheels & tires categories for the wear items around them.
OEM ACDelco parts, genuine GM filters, Duramax fuel-filter kits, and factory batteries: eBay Motors is where the genuine and NOS OEM stock lives, often cheaper than the dealer. Use the search buttons above to jump straight to ACDelco filters, iridium plugs, the right battery group, and Duramax fuel kits.

Stay ahead of the schedule and a Silverado will run past 200,000 miles without drama. Fall behind on the cheap stuff — a filter, a belt, a fuel filter the diesel was begging for — and the truck will find a very expensive way to remind you. Keep the shelf stocked, let the Oil Life System be your calendar, and confirm every number here against your own truck before you turn a wrench.