GMC Savana, GMT600 (USA / CAN)

Differential fluid capacity & service interval

GMC Savana, GMT600 (USA / CAN) differential fluid capacity is 2.5-3 liters. Service intervals include checking at 7500 miles, 3000 miles, or 8000 km, and changing at 7500 miles, 3000 miles, or 24000 km. The data covers 32 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

Type	Specifications
Savana 8.1 V8 (2001-2002) Rear	Use: Normal Capacity 2,5-3 liter Check 7500 miles
Savana 8.1 V8 (2001-2002) Rear	Use: Severe Capacity 2,5-3 liter Check 3000 miles
Savana 8.1 V8 (2001-2002) Rear, with differential lock	Use: Normal Capacity 2,5-3 liter Check 7500 miles
Savana 8.1 V8 (2001-2002) Rear, with differential lock	Use: Severe Capacity 2,5-3 liter Check 3000 miles
Savana 8.1 V8 (2001-2002) Rear, with differential lock	Use: First change only Capacity 2,5-3 liter Change 7500 miles
Savana 8.1 V8 (2001-2002) Rear, with differential lock	Use: First change only, severe Capacity 2,5-3 liter Change 3000 miles
Savana 4.3 V6 (1997-2002) Rear	Use: Normal Capacity 2,5-3 liter Check 7500 miles
Savana 4.3 V6 (1997-2002) Rear	Use: Severe Capacity 2,5-3 liter Check 3000 miles
Savana 4.3 V6 (1997-2002) Rear, with differential lock	Use: Normal Capacity 2,5-3 liter Check 7500 miles
Savana 4.3 V6 (1997-2002) Rear, with differential lock	Use: Severe Capacity 2,5-3 liter Check 3000 miles
Savana 4.3 V6 (1997-2002) Rear, with differential lock	Use: First change only Capacity 2,5-3 liter Change 7500 miles
Savana 4.3 V6 (1997-2002) Rear, with differential lock	Use: First change only, severe Capacity 2,5-3 liter Change 3000 miles
Savana 5.0 V8 (1997-2002) Rear	Use: Normal Capacity 2,5-3 liter Check 7500 miles
Savana 5.0 V8 (1997-2002) Rear	Use: Severe Capacity 2,5-3 liter Check 3000 miles
Savana 5.0 V8 (1997-2002) Rear, with differential lock	Use: Normal Capacity 2,5-3 liter Check 7500 miles
Savana 5.0 V8 (1997-2002) Rear, with differential lock	Use: Severe Capacity 2,5-3 liter Check 3000 miles
Savana 5.0 V8 (1997-2002) Rear, with differential lock	Use: First change only Capacity 2,5-3 liter Change 7500 miles
Savana 5.0 V8 (1997-2002) Rear, with differential lock	Use: First change only, severe Capacity 2,5-3 liter Change 3000 miles
Savana 5.7 V8 (1997-2002) Rear	Use: Normal Capacity 2,5-3 liter Check 7500 miles
Savana 5.7 V8 (1997-2002) Rear	Use: Severe Capacity 2,5-3 liter Check 3000 miles
Savana 5.7 V8 (1997-2002) Rear, with differential lock	Use: Normal Capacity 2,5-3 liter Check 7500 miles
Savana 5.7 V8 (1997-2002) Rear, with differential lock	Use: Severe Capacity 2,5-3 liter Check 3000 miles
Savana 5.7 V8 (1997-2002) Rear, with differential lock	Use: First change only Capacity 2,5-3 liter Change 7500 miles
Savana 5.7 V8 (1997-2002) Rear, with differential lock	Use: First change only, severe Capacity 2,5-3 liter Change 3000 miles
Savana 6.5 V8 Diesel (1997-2002) Rear	Use: Normal Capacity 2,5-3 liter Check 8000 km
Savana 6.5 V8 Diesel (1997-2002) Rear	Use: Severe Capacity 2,5-3 liter Change 24000 km
Savana 7.4 V8 (1997-2000) Rear	Use: Normal Capacity 2,5-3 liter Check 7500 miles
Savana 7.4 V8 (1997-2000) Rear	Use: Severe Capacity 2,5-3 liter Check 3000 miles
Savana 7.4 V8 (1997-2000) Rear, with differential lock	Use: Normal Capacity 2,5-3 liter Check 7500 miles
Savana 7.4 V8 (1997-2000) Rear, with differential lock	Use: Severe Capacity 2,5-3 liter Check 3000 miles
Savana 7.4 V8 (1997-2000) Rear, with differential lock	Use: First change only Capacity 2,5-3 liter Change 7500 miles
Savana 7.4 V8 (1997-2000) Rear, with differential lock	Use: First change only, severe Capacity 2,5-3 liter Change 3000 miles

Additional Notes

The rear differential fluid capacity across all GMC Savana GMT600 engine configurations from 1997-2002 falls within a 2.5-3 liter range. A range rather than a single fixed value reflects real-world variation between axle assemblies, where the actual fill level is determined by the overflow hole at the fill plug rather than a precise measured volume.
For the 4.3 V6, 5.0 V8, 5.7 V8, and 7.4 V8 gasoline engines, the standard rear differential service interval under normal use conditions is a fluid level check at every 7,500 miles. Under severe use conditions, that check interval is halved to 3,000 miles. A check interval means the fluid level is inspected and topped off as needed, not necessarily drained and replaced.
Configurations equipped with a rear differential lock carry an additional first-change-only interval on top of the standard check schedule. Under normal conditions, the first fluid change is due at 7,500 miles; under severe conditions, that first change is moved up to 3,000 miles. This break-in change is specific to locking differentials because the clutch pack and internal components generate fine metallic particles during initial operation that benefit from early fluid replacement.
The 6.5 V8 Diesel Savana uses kilometer-based service intervals rather than mile-based ones, with a fluid level check at 8,000 km under normal conditions. Under severe conditions, the specification shifts from a check to a full fluid change at 24,000 km, which is a structurally different service action compared to the gasoline engine entries that list only check intervals under severe use.
The 7.4 V8 engine is listed for model years 1997-2000, while the 8.1 V8 appears for 2001-2002. Both share the same 2.5-3 liter rear differential capacity and identical check and first-change intervals, despite representing different displacement engines introduced at different points within the 1997-2002 generation.
The 8.1 V8, available from 2001-2002, carries the same differential lock first-change intervals as the earlier gasoline engines: 7,500 miles under normal conditions and 3,000 miles under severe conditions. The consistency of these values across the 4.3 V6, 5.0 V8, 5.7 V8, 7.4 V8, and 8.1 V8 suggests the intervals are tied to the axle assembly rather than the engine driving it.

Additional Notes

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