2020 Chevrolet Suburban Fluid Type Specs
AI-generated reference. Always verify torque values, fluid capacities, intervals, and procedures against the manufacturer's service manual or OEM repair information before performing work. Repairius is not liable for damage from acting on this content without verification.
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Quick Reference
| Fluid | Type/Spec | Capacity (approximate) |
|---|---|---|
| Engine Oil | dexos1 Gen2 (or newer), SAE 0W-20 (5.3L/6.2L Gas) or SAE 5W-30 (3.0L Diesel) | 8.5 quarts (5.3L/6.2L), 7.5 quarts (3.0L Diesel) |
| Engine Coolant | DEX-COOL Antifreeze/Coolant | 16.7 quarts (5.3L/6.2L), 15.6 quarts (3.0L Diesel) |
| Transmission Fluid | DEXRON-HP | 12.4 quarts (total fill) |
| Transfer Case | DEXRON ULV | 1.7 quarts |
| Front Differential | SAE 75W-90, GM Spec 9986175 | 1.7-2.0 quarts |
| Rear Differential | SAE 75W-90, GM Spec 9986175 (with friction modifier if G80 RPO) | 2.5-2.8 quarts |
| Brake Fluid | DOT 3 or DOT 4 | As needed |
| Power Steering | DEXRON VI (automatic transmission fluid) | As needed |
| Washer Fluid | GM Optikleen or equivalent | 1 gallon (approx.) |
| DEF (Diesel Exhaust Fluid) | ISO 22241 (API 인증) | 5.1 gallons |
Note: Capacities are approximate and may vary based on specific vehicle configuration, build date, and service procedure. Always verify with your owner's manual or OEM service information.
Engine Oil
For the 2020 Chevrolet Suburban, selecting the correct engine oil is paramount for engine longevity and performance. Gasoline engines (5.3L V8 and 6.2L V8) require SAE 0W-20 full synthetic engine oil that meets the dexos1 Gen2 specification or a newer, backward-compatible dexos specification. The dexos1 Gen2 standard ensures protection against low-speed pre-ignition (LSPI), critical for modern direct-injection turbocharged engines, though your naturally aspirated Suburban also benefits from its superior protection. The oil capacity for these gasoline engines is approximately 8.5 quarts.
For the 3.0L Duramax diesel engine, an SAE 5W-30 full synthetic diesel engine oil is specified. This oil must meet the appropriate diesel engine oil standards, typically API CK-4 or a newer specification, and the specific GM diesel engine oil specification. The capacity for the diesel engine is approximately 7.5 quarts.
Maintenance Interval: It is recommended to follow the Oil Life Monitoring (OLM) system for oil change intervals. This system takes into account driving conditions and will alert you when an oil change is due. Typically, this can range from 7,500 to 10,000 miles or once a year, whichever comes first.
Common Pitfalls: Using conventional oil or an oil that does not meet the dexos1 specification for gasoline engines can lead to increased engine wear and potential damage. For diesel engines, using gasoline engine oil or an oil not meeting the correct diesel specifications can severely impact exhaust aftertreatment systems and engine performance.
Engine Coolant
The 2020 Chevrolet Suburban utilizes DEX-COOL Antifreeze/Coolant, which is an Organic Acid Technology (OAT) coolant, typically orange or sometimes pink in color. This specialized coolant is designed for extended service intervals and provides excellent corrosion protection for aluminum engine components. Never mix DEX-COOL with other types of coolant (e.g., HOAT, IAT) as this can lead to gel formation, system blockages, and severe damage to the cooling system and engine. The capacity for the gasoline engines is around 16.7 quarts, while the diesel engine holds approximately 15.6 quarts.
Maintenance Interval: DEX-COOL has an extended service life, typically recommended for replacement every 5 years or 100,000 to 150,000 miles, whichever comes first. However, it
More specs for the 2020 Chevrolet Suburban
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2020 Chevrolet Suburban Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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