Chevrolet Avalanche, GMT805 (USA / CAN)

Additional Notes

• The Chevrolet Avalanche GMT805 rear differential, whether fitted with a limited slip unit or a steerable axle configuration, carries a notably wide capacity range of 2.28 to 3.62 liters across all 5.3 V8 variants from 2001-2006. A spread of that magnitude typically reflects the difference between a partial drain-and-refill service fill and a full overhaul or housing replacement fill.
• The front differential on the AWD-equipped 5.3 V8 holds a considerably smaller volume, specified at 1.66 to 1.73 liters. The narrow range here contrasts sharply with the rear axle figures and points to a more compact front differential housing with less variation between service and overhaul fill levels.
• All five differential positions across both the standard and AWD 5.3 V8 configurations share the same inspection interval of every 12,500 km or 12 months under normal use conditions, whichever comes first. The time-based component of that interval means fluid condition is evaluated on an annual basis regardless of mileage accumulation.
• The rear differential capacity range of 2.28 to 3.62 liters applies identically to both the limited slip and steerable axle rear differentials on the non-AWD 5.3 V8. The same figures carry over without change to the AWD variant's rear differentials, indicating no capacity distinction between the two drivetrain configurations at the rear axle.
• The AWD 5.3 V8 adds a front differential to the service schedule that the standard 5.3 V8 does not carry, bringing the total number of differential service points from two to three. The front unit's 1.66 to 1.73 liter capacity falls well below the rear axle range, reflecting the structural difference between front and rear differential assemblies on a truck-based platform.