* 26 gallons: This was the standard fuel tank size.
* 34 gallons: Some models, particularly those with larger engines or certain trim levels, came with a larger 34-gallon tank.
To know for certain the capacity of a *specific* 2006 Chevy Tahoe, you'd need to check the vehicle's documentation (owner's manual) or look at the fuel filler door. The sticker on the fuel filler door often states the fuel tank capacity.
