Fitment notes: Heavy-duty AGM required for diesel starting demands; dual battery configuration available on some models
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Every control module on the 2024-2026 Dodge Ram 3500 — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
⚠️ Critical security module. Enforces Security Gateway protocol. Replacement requires dealer-level authentication and all modules may need reconfiguration.
Door Module (DDM/PDM)1.2 hr R&Raftermarket tool +0.3 hrwith power windows/locks▸ programming details
📍 Inside door panel, driver and passenger doors
🔧 Autel MaxiSys or wiTECH 2.0
⚠️ Controls window, lock, and mirror functions. Requires window auto-up/down relearn after replacement.
📍 Left side of engine bay, mounted on inner fender near firewall
🔧 wiTECH 2.0 or Autel MaxiSys Elite/Ultra with security bypass
⚠️ VIN-locked, requires Security Gateway unlock and VIN-specific firmware download. New Hurricane inline-6 and updated Cummins diesel use different PCM hardware.
📍 Instrument panel, behind gauge cluster trim bezel
🔧 wiTECH 2.0
⚠️ VIN and mileage programming required. Mileage transfer from old cluster mandatory. New digital cluster design.
Headlamp Control Module (HCM)0.8 hr R&Raftermarket tool +0.3 hrwith LED or adaptive headlamps▸ programming details
📍 Behind left headlamp assembly in engine bay
🔧 Autel MaxiSys or wiTECH 2.0
⚠️ Controls adaptive lighting functions. Requires headlamp aim calibration after replacement. New matrix LED technology available.
Seat Control Module (SCM)0.8 hr R&Rrelearn only +0.2 hrwith power seats and memory▸ programming details
📍 Under driver and passenger seats
🔧 Scan tool with bi-directional control
⚠️ Controls seat position, heating, ventilation, and memory. Requires memory position relearn after replacement.
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2025 Dodge Ram 3500 6.7L I6 Cummins Diesel and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.