Winter Car Prep Wisconsin: Checklist for Roads

Wisconsin winters are no joke — cold temperatures, snow, ice, and plenty of salted roads. For your car to handle the season safely and reliably, a bit of prep goes a long way. Whether you drive a compact sedan, SUV, or a heavy‑duty truck, the following checklist helps ensure you stay road‑ready. At Kunes GMC of Stoughton we recommend checking these items before the snow flies.

Wisconsin winters bring more than just a dusting of snow—they deliver months of cold weather, icy roads, and unpredictable winter storms that can challenge even the most experienced drivers. Navigating these wintry conditions requires more than just a reliable vehicle; it calls for a shift in mindset and a commitment to safety every time you get behind the wheel. From sudden temperature drops to snow and ice that linger for weeks, winter driving in Wisconsin is all about preparation, patience, and respect for the road. Whether you’re commuting to work or heading out for a weekend adventure, understanding what makes winter driving unique is the first step to staying safe and confident all season long.

• Inspect battery health, especially if it’s more than a few years old — cold weather reduces battery efficiency and increases the chance of a no‑start. Freezing temperatures and low temperatures can significantly reduce battery power, so it’s important to check battery health before winter.
• Clean battery terminals and cables; corrosion or weak connections reduce starting power. Also, inspect the charging system along with battery terminals and cables to ensure reliable starts in cold weather.
• Test lights: headlights, brake lights, fog lights, turn signals — good visibility is essential for shorter days and snowy conditions.
• For electric vehicle owners, keep your electric vehicle plugged in during freezing temperatures to maintain battery efficiency and range, as low temperatures can impact battery performance.

• Swap on winter or all‑season tires designed for snow and ice. Snow tires are specifically engineered to provide better traction on icy and snowy roads, improving traction, braking, and control on slick surfaces.
• For optimal safety in winter conditions, replace worn tires with new tires that meet winter performance standards.
• Check tire pressure frequently — cold weather causes pressure drops that can affect grip and handling. Always consult your owner's manual or vehicle owner's manual for the recommended tire pressure and tire specifications for winter driving.
• Inspect brakes: ensure pads, rotors and fluid are in good shape. Snow, slush, and salt make braking reliability more important than ever.
• If you drive a 4WD or AWD vehicle, test the system to be sure it engages smoothly and functions correctly before snow hits.

• Fill windshield wiper fluid with a winter-grade antifreeze solution and replace worn wiper blades to keep the windshield clear. A single snowstorm can quickly deplete the reservoir, so check and refill regularly. Using winter-specific windshield wiper fluid helps prevent freezing during harsh conditions. Winter-grade washer fluid and antifreeze solutions are available at most auto parts stores and auto parts stores.
• Check antifreeze/coolant levels and freeze protection strength — ensuring the engine stays protected against freezing or overheating.
• Confirm heating system and defrosters work properly to keep the cabin warm and ensure visibility on cold, frosty mornings.

Include items such as: blankets, ice scraper, snow brush, shovel, flashlight, spare gloves, jumper cables or a small jump‑starter, aid kit, first aid kit, non‑perishable food like trail mix, and water. In case of delays or breakdowns, this kit can be a lifesaver.

Salt used on roads can speed up rust and corrosion. Thoroughly wash the undercarriage, wheel wells, and lower panels periodically — especially after heavy snow or driving on salted roads. Consider using mud flaps or rust‑resistant coatings for extra protection.

Check that all lights are functional and bright, mirrors are adjusted, windshield washers work, and windows seal properly. Good visibility and a warm cabin keep you safer and more alert during winter commutes.

When winter weather hits, safe driving habits become your best defense against accidents and breakdowns. Start every trip by clearing all snow and ice from your vehicle—including headlights, brake lights, mirrors, and the roof—to ensure maximum visibility for you and others. Always buckle your seat belt and keep your headlights on, even during the day, to help other drivers see you through snow and fog.

On slippery roads, reduce your speed and increase your following distance to allow for longer stopping times. Gentle acceleration and braking are key—avoid sudden braking or sharp turns, which can cause you to lose control. If you start to skid, steer gently in the direction you want to go and avoid slamming on the brake pedal.

Be especially cautious around snow plows and give them plenty of space—they move slowly and can create clouds of snow that reduce visibility. Watch for changing road conditions, such as black ice on bridges and shaded areas. Never idle your vehicle for long periods with the exhaust pipe blocked by snow, as this can lead to dangerous carbon monoxide poisoning. By staying alert and adapting your driving to the harsh winter conditions, you’ll help keep yourself and everyone on the road safer.

Smart navigation and route planning are essential for Wisconsin drivers facing winter road conditions. Before you head out, check the latest weather forecasts and road condition updates—many state and local agencies provide real-time information online or through mobile apps. If a winter storm is in the forecast, consider postponing non-essential travel or choosing main roads that are more likely to be cleared by snow plows.

Always keep your fuel tank at least half full to prevent fuel lines from freezing and to ensure you have enough gas in case of unexpected delays. Let someone know your planned route and estimated arrival time, especially if you’re traveling in rural areas or during severe weather. Carry a winter emergency kit with essentials like a flashlight with extra batteries, non-perishable snacks, water, a snow shovel, and kitty litter or cat litter for traction if you get stuck.

Plan for extra travel time and avoid shortcuts on less-traveled roads, which may not be plowed or treated as quickly. Use navigation tools to monitor traffic and road closures, and be prepared to adjust your route if conditions worsen. By planning ahead and staying flexible, you’ll be better equipped to handle whatever winter throws your way and reach your destination safely.

Schedule a winter check‑up at a trusted service center like Kunes GMC of Stoughton for fluid top‑off, brake inspection, battery test, and overall vehicle health before extremes hit.

If you drove on regular tires during fall, swap to winter tires at the first sign of snow or below‑freezing conditions. After winter, rotate them back or inspect for uneven wear to maintain performance and safety.

Cold weather thickens oil and reduces engine efficiency. If your vehicle is due for an oil change, do it before winter or use oil with manufacturer‑recommended viscosity for cold climates.

Make sure your registration, insurance, and emergency contacts are current. Keep roadside assistance or roadside‑help contacts handy — winter conditions increase chances of breakdowns, flat tires, or stuck vehicles.

• Local mechanics know Wisconsin weather and common winter wear — they understand the demands winter puts on vehicles and how to prep accordingly.
• Easy access to genuine parts: tires, wiper blades, antifreeze, winter floor mats — everything you need to get winter ready without long waits or mismatches.
• Service packages tailored to winter: pre‑winter inspections, battery load testing, brake check‑ups, fluid flushes and washer upgrades.
• Convenience and peace‑of‑mind: having a nearby dealer that also handles seasonal maintenance and emergency repairs keeps you ready for whatever winter brings.

Winter in Wisconsin demands respect — but with proper preparation, your car can handle snow, ice, cold, and salt like a champ. A few preventive steps go a long way in keeping you safe and mobile through the season.

Use this checklist to prep your vehicle early, stay ahead of winter’s challenges, and enjoy peace of mind behind the wheel. If you want expert help or a full winter-prep inspection, bring your ride to Kunes GMC of Stoughton — and drive safely all winter long.