2003 GMC Envoy Owner's Manual - Page 400

L6 Engine I V8 Engine Differential Fluid Rear Front Fuel Tank Envoy with Envoy Envoy XL RPO NNK 18.7 gallons 22.0 gallons 25.3 gallons 70.8 L 83.3 L - I 4.0 pints I 1.9 L 0.8 L 1 4.0 pints 2.6 pints I 1.9 L 0.8 L 2.6 pints I 95.8 L 25.3 gallons I 95.8 L All capacities are approximate. When adding, be sure to fill to the appropriate level, as recommended in this manual. Recheck the fluid level after filling. 5-105