2026 Dynamax Grand Sport Gt problems, complaints & recalls
Safety recalls (1)
Fuel System, Diesel: Pre-Heater 2026-09-21 · campaign 26V603000 · 16 vehicles
Defect: Forest River, Inc (Forest River) is recalling certain 2026-2027 Dynamax Grand Sport GT recreational vehicles. The engine pre-heat pump may have been improperly installed, causing the coolant hose to fail.
Risk: A coolant hose failure can cause the engine to overheat, increasing the risk of a crash.
Fix: Dealers will re-pin the wiring harness, re-route the coolant hoses, and replace parts as necessary, free of charge. Owner notification letters were mailed October 20, 2026. Owners may contact Forest River customer service at 1-574-522-1583. Forest River's number for this recall is 40-2097.
What owners report
No detailed complaint narratives on file.
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.