Checking for maintenance history, fuel type and wheel condition are tips for buying a used Hummer. Maintenance records should be traceable and indicate what repairs were made and which parts were replaced. Sellers should provide a clean title, true mileage count, and proof that there are no vehicle liens.
Used Hummers are available with both gas and diesel engines. The off-road performance of the engines are similar, though the diesel does better in water and offers better control on steep terrain. Original factory-made wheels prolong the efficiency of the Hummer. Aftermarket wheels often fit incorrectly, causing stress on the suspension and premature wear on other parts.