Use this pre summer maintenance checklist in Ontario to get your car, SUV, truck, sedan, or minivan ready for heat, traffic, cottage drives, and family road trips. Ontario summers can be hard on vehicles. Between stop-and-go traffic, construction zones, weekend road trips, hot pavement, heavy rain, and long drives from Burlington to Hamilton, Oakville, Milton, Grimsby, or Brantford, small vehicle issues can become bigger problems quickly.