2017 GMC Sierra 1500 Transmission Fluid & Service Spec
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Quick Answer
- Transmission Make/Model: GM 8L90 (RPO M5U) or GM 6L80 (RPO MYC)
- OEM Fluid Spec: DEXRON HP (for 8L90), DEXRON VI (for 6L80)
- Drain & Fill Capacity:
- 8L90: Approximately 6-7 quarts (verify with service manual)
- 6L80: Approximately 6-7 quarts (verify with service manual)
- Full Overhaul Capacity:
- 8L90: Approximately 11.7 quarts (verify with service manual)
- 6L80: Approximately 11.5 quarts (verify with service manual)
- Filter OEM Part Number: Verify with dealer or service manual based on transmission model.
- Recommended Service Interval:
- Normal Duty: 97,500 miles (150,000 km)
- Severe Duty/Towing: 45,000 miles (72,000 km)
Fluid Type Explained
The 2017 GMC Sierra 1500 could be equipped with one of two primary automatic transmissions: the 8-speed GM 8L90 (RPO M5U) or the 6-speed GM 6L80 (RPO MYC). It is crucial to identify which transmission your specific vehicle has, as the fluid requirements differ.
The 8L90 transmission, a more modern and efficient 8-speed unit, requires DEXRON HP transmission fluid. This is a very specific, low-viscosity fluid designed for optimal performance and longevity of this advanced transmission. Using any other type of fluid can lead to premature wear, shifting problems, and potential transmission failure.
The 6L80 transmission, a robust 6-speed automatic, utilizes DEXRON VI transmission fluid. DEXRON VI is a synthetic blend fluid that offers improved viscosity stability, oxidation resistance, and friction durability compared to older DEXRON specifications. It\
More specs for the 2017 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.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
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
2017 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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