2018 Chevrolet Silverado 1500 Coolant Capacity & Type
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.
Working on this 2018 Chevrolet Silverado 1500? Run just this one job through Repairius.
No big switch. Write the estimate, text it for approval, and get paid on your phone. Keep everything else the way it is.
14-day free trial · credit card required · cancel anytime
The 2018 Chevrolet Silverado 1500’s cooling system holds approximately 16.3 to 17.5 quarts (15.4 to 16.5 liters) of coolant, though this can vary slightly by engine. Maintaining the correct coolant level and type is crucial for your truck's longevity and performance.
Quick Answer
- Total Cooling System Capacity: 16.3 - 17.5 quarts (15.4 - 16.5 liters)
- OEM Coolant Spec: Red/Orange, Dex-Cool (OAT - Organic Acid Technology), GM Dex-Cool specification (GM 6277M)
- Mix Ratio: Typically 50/50 prediluted, or 50/50 concentrate mixed with distilled water.
Capacity by Engine Option
| Engine Type | Approximate Capacity (Quarts/Liters) |
|---|---|
| 4.3L V6 | ~16.3 quarts (15.4 liters) |
| 5.3L V8 | ~17.0 quarts (16.1 liters) |
| 6.2L V8 | ~17.5 quarts (16.5 liters) |
These capacities are for a complete system flush and fill. Always consult your owner's manual for the most precise figures for your specific configuration.
Flush Interval
Chevrolet recommends specific coolant flush intervals for the 2018 Silverado 1500 to ensure optimal cooling system performance and protection against corrosion.
- Normal Duty: Typically every 5 years or 150,000 miles, whichever comes first.
- Severe Duty: If your driving conditions involve frequent towing, heavy loads, or extreme temperatures, it
More specs for the 2018 Chevrolet Silverado 1500
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
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
2014 Silverado 1500
2015 Silverado 1500
2016 Silverado 1500
2017 Silverado 1500
2019 Silverado 1500
2020 Silverado 1500
Maintenance & repair guides
2018 Chevrolet Silverado 1500 Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
Browse by make
Running an auto or diesel repair shop?
Compare Repairius to the shop software you're paying for
$99.99/month (first location included), unlimited users, 14-day free trial.