2018 Chevrolet Tahoe 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 | SAE 0W-20, dexos1 Gen2 | 8 quarts |
| Engine Coolant | DEX-COOL Antifreeze/Coolant | 16.7 quarts |
| Transmission Fluid | DEXRON-VI Automatic Trans. Fluid | 11.5 - 12.4 quarts |
| Transfer Case | DEXRON-VI Automatic Trans. Fluid | 1.6 - 2.0 quarts |
| Front Differential | SAE 75W-90, API GL-5 | 1.7 - 2.0 quarts |
| Rear Differential | SAE 75W-90, API GL-5 (with friction mod if needed) | 2.5 - 2.8 quarts |
| Brake Fluid | DOT 3 or DOT 4 | As needed |
| Power Steering | DEXRON-VI Automatic Trans. Fluid | 1.0 - 1.5 quarts (verify in owner's manual) |
| Washer Fluid | Pre-mixed Windshield Washer Fluid | 1 gallon |
Engine Oil
For your 2018 Chevrolet Tahoe, the manufacturer specifies SAE 0W-20 engine oil meeting the dexos1 Gen2 specification. This is a critical specification; using oil that does not meet dexos1 Gen2 can lead to engine damage and potentially void your powertrain warranty. The dexos1 standard ensures the oil meets stringent requirements for engine cleanliness, wear protection, and fuel economy, particularly in turbocharged gasoline direct injection (TGDI) engines, which can be prone to low-speed pre-ignition (LSPI).
The typical oil capacity for the 2018 Tahoe's engine is approximately 8 quarts with a filter change. Always verify the exact capacity with your dipstick after filling.
Maintenance Interval: The Oil Life Monitoring (OLM) system in your Tahoe will determine the optimal oil change interval, which can range from 7,500 to 10,000 miles or more under normal driving conditions, or sooner under severe conditions. It is crucial to follow the OLM system's recommendation and not exceed one year between oil changes, regardless of mileage.
Common Pitfalls: Never use an engine oil that does not carry the official dexos1 Gen2 certification. While some oils may claim to be
More specs for the 2018 Chevrolet Tahoe
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
2018 Chevrolet Tahoe 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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