2015 GMC Sierra 1500 Coolant Capacity & Type
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The 2015 GMC Sierra 1500 cooling system typically holds between 16.3 to 17.6 quarts (15.4 to 16.6 liters) of coolant, depending on the engine configuration.
Quick Answer
- Total Cooling System Capacity: 16.3 - 17.6 quarts (15.4 - 16.6 liters)
- OEM Coolant Spec: DEX-COOL (Orange/Red, OAT, GM standard GMW3420)
- Mix Ratio: 50/50 pre-mix (or concentrate mixed with distilled water)
Capacity by Engine Option
| Engine Type | Capacity (Quarts) | Capacity (Liters) |
|---|---|---|
| 4.3L V6 (LV3) | 16.3 | 15.4 |
| 5.3L V8 (L83) | 17.6 | 16.6 |
| 6.2L V8 (L86) | 17.6 | 16.6 |
Flush Interval
For the 2015 GMC Sierra 1500, the recommended coolant flush interval is:
- Normal Duty: Every 5 years or 150,000 miles, whichever comes first.
- Severe Duty: If you frequently tow, haul heavy loads, drive in extreme temperatures, or operate in dusty conditions, it
More specs for the 2015 GMC Sierra 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
Maintenance & repair guides
2015 GMC Sierra 1500 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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