To find the specific MPG for your 2006 Suburban, you need to know its engine size (e.g., 4.8L, 5.3L, 6.0L). Once you have that, you can look up the EPA fuel economy estimates online (e.g., fueleconomy.gov, or a reputable automotive website). Then, with the fuel tank capacity (usually around 26 gallons for most 2006 Suburbans, but check your owner's manual to be sure), you can calculate the approximate range using the following formulas:
* City Range: City MPG * Fuel Tank Capacity (gallons)
* Highway Range: Highway MPG * Fuel Tank Capacity (gallons)
In short: I cannot give you a specific range without knowing the engine size and verifying the exact fuel tank capacity of your particular 2006 Chevrolet Suburban.