Living in Canada, you are no doubt accustomed to wild weather swings, and extremely polarized driving conditions.
Going from the relentlessly hot and baking sun in the summer, to snow, ice, and salt in the winter, can wreak havoc on your vehicle without the proper care.
What is underbody flushing? It’s simply a means of washing a vehicle’s underside to remove anything that could cause rust or corrosion over the long term. GM has, for example, recommended for years that owners flush the underbody of their vehicle at least once a year to remove salt deposits, mud, dirt and other accumulated crud.
Other manufacturers may recommend that kind of cleaning as well, and even where it isn’t recommended, it is a good idea for those who engage in off-road driving or frequently travel unpaved roads.