GMC Yukon / XL, T1XX (USA / CAN)

Additional Notes

• The GMC Yukon / XL T1XX transfer case holds 1.5 liters of fluid across all listed AWD configurations, covering the 3.0 Diesel, 5.3 V8, and 6.2 V8 engines. A consistent fill volume like 1.5 liters across multiple drivetrain variants typically reflects a shared transfer case unit rather than engine-specific hardware.
• Under normal use conditions, the transfer case fluid change interval is 97,500 miles for every AWD configuration in the specifications. Normal use generally refers to on-road driving without sustained towing, off-road operation, or repeated short-trip cycles.
• Under severe use conditions, the change interval drops to 45,000 miles across all listed AWD configurations. Severe use classifications typically apply when a vehicle is subjected to conditions that accelerate fluid degradation, such as towing near maximum capacity, frequent stop-and-go driving, or off-road use.
• The 45,000-mile severe interval represents roughly a 54 percent reduction compared to the 97,500-mile normal interval. The fluid capacity of 1.5 liters remains unchanged between the two use conditions, meaning only the service frequency differs, not the fill volume.
• The 5.3 V8 AWD appears under two separate configuration entries: one covering 2020-2022 and another starting from 2022. Both entries carry identical capacity and interval figures, with 1.5 liters and intervals of 97,500 miles for normal use and 45,000 miles for severe use.
• The 6.2 V8 AWD follows the same dual-entry pattern as the 5.3 V8, with a 2020-2022 configuration and a separate entry beginning in 2022, both specifying 1.5 liters and the same normal and severe service intervals.
• The 3.0 Diesel AWD carries a single configuration entry starting from 2020, with transfer case fluid capacity and service intervals identical to the V8 AWD variants: 1.5 liters, 97,500 miles under normal use, and 45,000 miles under severe use.