Categories October Surprise 2024 How much fuel do you take? | Chevy Tahoe Forum – Tahoe Yukon Forum Post author By Post date October 1, 2025 When the idiot light comes on, it’s still rare to put in much more than 26 gallons. Being that the tank is long, I reckon there’s about 3 gallons of unusable gas; mine is rated for 31.2 gallons or 31.5 depending on the source.