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2026 GMC SIERRA 2500HD
6.6L V8 L8T•4WD•AUTOMATIC•gas•turbo
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Repairs0Labor508Torque149Fluid10DTC2012Battery1Maintenance0Recalls0
Fluid · Automatic Transmission

Automatic Transmission

for 2026 GMC Sierra 2500HD 6.6L V8 L8T · 4WD
Fluid Type
Mobil 1 Synthetic LV ATF HP
Spec: GM TES 668
Capacity
17.4qt
16.46 L
Drain & Refill
5.5 qt
5.2 L
Change Interval
45,000 mi
72,405 km
Data quality
Book-style estimate
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Notes

10-speed 10L1000 transmission. Drain-and-refill is typical service amount; full capacity requires complete fluid exchange

Other fluid systems on this vehicle

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