Commercial Vehicles Under Wisconsin Lemon Law
How Wisconsin's Lemon Law treats commercial and heavy-duty vehicles — broad coverage with no GVWR cap, and the heavy-duty remedy timeline.
Wisconsin’s Lemon Law covers commercial and heavy-duty vehicles broadly under Wis. Stat. § 218.0171. The statute defines “motor vehicle” as nearly any motor-driven vehicle required to be registered in Wisconsin — there is no GVWR cap. The only excluded vehicle types are mopeds, semitrailers, and trailers designed for use in combination with a truck or truck tractor.
What’s covered
- Light-duty pickups (F-150, Silverado 1500, Ram 1500, Tundra).
- Heavy-duty pickups and trucks (F-250/F-350, Silverado 2500/3500, Ram 2500/3500) — covered, with no weight cap.
- Business-use vehicles — the “consumer” definition reaches any purchaser other than for resale, so business and commercial buyers can qualify.
What’s NOT covered
- Mopeds.
- Semitrailers and trailers designed for use in combination with a truck or truck tractor.
For these excluded vehicle types, Magnuson-Moss provides alternative civil-court remedies with Wisconsin’s unusually long 6-year UCC SOL.
The “heavy-duty vehicle” timeline
Vehicles with a gross weight rating over 10,000 lbs are classified as heavy-duty under § 218.0171. This classification does not affect eligibility — it only changes the manufacturer’s deadline to deliver a refund or replacement after a written election (a longer window than the standard 30 days). The automatic double-damages and mandatory-fee mechanism still applies once that deadline passes.
Common heavy-duty defects
- Diesel emissions system failures (DEF, DPF, SCR).
- Heavy-duty transmission failures.
- Fuel pump failures.
- Towing-package electrical failures.
Wisconsin agricultural / dairy / fishing pickup market
Wisconsin’s strong agricultural, dairy, and Lake Country markets create heavy-duty pickup volume. Because there is no GVWR cap, these vehicles generally remain within § 218.0171 — and Magnuson-Moss is available as a parallel federal tool.
Bottom line
Wisconsin imposes no GVWR cap — heavy-duty pickups and commercial trucks are covered by § 218.0171, with the heavy-duty classification only lengthening the manufacturer’s remedy deadline. Magnuson-Moss remains a parallel option, with Wisconsin’s unusually long 6-year UCC SOL providing strong runway.
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