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Fitment notes: 12V accessory battery for EV system; high-performance AGM required for start-stop and accessory loads
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Every control module on the 2023-2026 GMC Hummer EV SUV — 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.
Electric Power Steering Control Module (EPSCM)3.5 hr R&Rdealer / factory tool +0.6 hr▸ programming details
📍 Integrated with steering gear assembly, front subframe center
🔧 GM SPS2 via MDI 2
⚠️ Includes CrabWalk and Extract Mode programming; steering angle sensor calibration required after replacement
📍 Under passenger seat, front mounting rail, passenger side
🔧 Autel IM608 or GM SPS2
⚠️ 14-way power seat with massage; position relearn after replacement
Rear Vision Camera Module (RVCM)0.7 hr R&Rrelearn only +0.2 hr▸ programming details
📍 Integrated with liftgate handle assembly, rear center
🔧 Autel IM608 or GM SPS2
⚠️ Washer system integrated; camera aim calibration recommended
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 GMC Hummer EV SUV Edition 1 Tri Motor AWD 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.