GMC Sierra 4WD (Flex Fuel) Fluid Specifications
Verified fluid grades and capacities for your car. (2026–2026)
Capacities
| Specification | Value |
|---|---|
| 300 mm Torque Converter Approximate Fluid Capacity Dry Fill |
10.6 L
11.2 qts |
| 300 mm Torque Converter Approximate Fluid Capacity Dry Fill |
11.50 L
12.1 qts |
| Allison 1000 |
12
12.7 |
| Complete Trans System - Approximate Capacity (6L80) |
11.5
12.2 quarts |
| Complete Trans System Fluid Capacity (6L80) |
11.7
12.4 quarts |
| Complete Trans System Fluid Capacity (6L90) |
11.7
12.4 quarts |
| Complete Trans System (Heavy Duty Cooling) - Approximate Capacity (6L80/6L90) |
11.7
12.4 quarts |
| Drain Plug Only - Approximate Capacity |
9.93
10.5 quarts |
| Drain Plug Only- Approximate Capacity |
9.93
10.5 quarts |
| Drop Pan and Filter - Approximate Capacity |
10.88
11.5 quarts |
| Drop Pan and Filter- Approximate Capacity |
10.88
11.5 quarts |
| Dry |
12.8
13.5 |
| Dry Transmission (Empty) - Approximate Capacity |
12.30
13 quarts |
| Dry Transmission (Empty)- Approximate Capacity |
12.30
13 quarts |
| Fill After Fluid and Filter Change |
7.0
7.4 |
| Fill After Rebuild |
12.0
12.7 |
| Oil Pan Removal |
7.3
7.7 |
| Oil Pan Removal |
7.3
7.7 quarts |
| Overhaul |
10.6 L
11 qts |
| Overhaul |
12.8
13.5 quarts |
| Overhaul - Approximate Capacity |
10.6
11 quarts |
| Overhaul - Approximate Capacity (6L80) |
9.9
10.5 quarts |
| Overhaul - Approximate Capacity (6L80/6L90) |
9.9
10.5 quarts |
| Overhaul - Approximate Capacity (6L90) |
9.9
10.5 quarts |
| Pan Removal |
4.7 L
5 qts |
| Pan Removal and Filter Replacement - Approximate Capacity (6L80/6L90) |
5.7
6.0 quarts |
| Pan Removal - Approximate Capacity |
4.7
5 quarts |
| Pan Removal - Approximate Capacity (6L80) |
5.7
6.0 quarts |
| Pan Removal - Approximate Capacity (6L90) |
6.0
6.3 quarts |
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