Good idea- change your oil and oil filter, air filter, spark plugs if over 50,0000, inspect brakes, rotate tires and check tire pressure, check fluids and make sure chassis is lubricated and in good physical condition.
RepairPal Certified shops can diagnose and repair your 2002 Chevrolet Trailblazer. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.