Every control module on the 2022-2026 GMC Hummer EV Pickup — 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.
Battery Thermal Management Module (BTMM) 8.0 hr R&R dealer / factory tool +1.5 hr ▸ programming details
📍 Integrated into Ultium battery pack assembly, front section
🔧 GM SPS2
⚠️ Controls liquid cooling/heating system for battery pack; critical for fast charging and cold-weather performance; typically serviced with BECM
Propulsion Power Inverter Module (TPIM) 3.5 hr R&R dealer / factory tool +1.0 hr ▸ programming details
📍 Under rear cargo bed, mounted to battery pack enclosure on driver side
🔧 GM SPS2
⚠️ Controls all three electric drive motors (front, rear-left, rear-right); requires high-voltage safety lockout and battery disconnect before removal
Electric Power Steering Control Module (EPSCM) 2.5 hr R&R dealer / factory tool +0.8 hr ▸ programming details
📍 Integrated into steering gear assembly, mounted to frame below driver footwell
🔧 GM SPS2
⚠️ Includes CrabWalk and Extract Mode programming; steering angle sensor calibration required after replacement
HVAC Control Module (HVAC) 2.5 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Behind center instrument panel, integrated with HVAC unit
🔧 Autel MaxiSys
⚠️ Controls dual-zone climate with heat pump system for EV efficiency
Electronic Brake Control Module (EBCM) 2.0 hr R&R dealer / factory tool +0.8 hr ▸ programming details
📍 Under hood, mounted to brake booster assembly on driver side firewall
🔧 GM SPS2
⚠️ Integrated with brake booster; includes regenerative braking coordination with TPIM; brake bleed required after replacement
All-Wheel Drive Control Module (AWDCM) 2.0 hr R&R dealer / factory tool +0.8 hr ▸ programming details
📍 Under rear cargo bed, mounted to battery pack enclosure center position
🔧 GM SPS2
⚠️ Manages torque distribution across three independent motors; includes CrabWalk, Extract Mode, and Watts to Freedom launch control
Super Cruise Control Module (SCCM) 1.5 hr R&R security gateway +1.5 hr with Super Cruise (Edition 1, 3X trims) ▸ programming details
📍 Behind headliner, center position near VCM
🔧 GM SPS2
⚠️ Processes LiDAR, camera, and radar data for hands-free driving; requires subscription activation and extensive calibration
Body Control Module (BCM) 1.5 hr R&R dealer / factory tool +1.0 hr ▸ programming details
📍 Behind center of instrument panel, above center console
🔧 GM SPS2
⚠️ VIN-locked; controls lighting, power distribution, door locks, and body functions; security gateway authentication required
Infotainment Control Module (ICM) 1.5 hr R&R dealer / factory tool +0.8 hr ▸ programming details
📍 Behind center touchscreen display in instrument panel
🔧 GM SPS2
⚠️ 13.4-inch touchscreen running Android Automotive OS; requires GM account linking and software activation after replacement
Adaptive Air Suspension Control Module (AASCM) 1.5 hr R&R dealer / factory tool +0.8 hr ▸ programming details
📍 Under rear cargo bed, passenger side frame rail
🔧 GM SPS2
⚠️ Controls adaptive air suspension with Extract Mode (up to 15.9 inches ground clearance); includes self-leveling and ride height adjustment
Multi-Flex Tailgate Control Module (MFTCM) 1.5 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Inside tailgate, driver side
🔧 Autel MaxiSys
⚠️ Controls six-function Multi-Flex tailgate including power release and step; unique to Hummer EV
Gateway Module (GM) 1.2 hr R&R security gateway +1.0 hr ▸ programming details
📍 Behind instrument panel, center position near BCM
🔧 GM SPS2
⚠️ Security gateway for all CAN bus networks; controls diagnostic access; replacement requires dealer-level authentication
Auxiliary Power Module (APM) 1.2 hr R&R dealer / factory tool +0.5 hr ▸ programming details
📍 Behind rear seat, driver side interior panel
🔧 GM SPS2
⚠️ DC-DC converter supplying 12V systems from high-voltage battery; critical for vehicle operation
Instrument Panel Cluster (IPC) 1.0 hr R&R dealer / factory tool +0.5 hr ▸ programming details
📍 Behind instrument panel, driver side
🔧 GM SPS2
⚠️ 13.4-inch digital display; VIN programming required; mileage transfer handled automatically via security link
Remote Control Door Lock Receiver (RCDLR) 1.0 hr R&R security gateway +0.8 hr ▸ programming details
📍 Behind rear seat, integrated into rear window area
🔧 GM SPS2
⚠️ Handles keyless entry and push-button start; key fob programming required after replacement
Door Control Module (DCM) 1.0 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Inside each door (four total: front left, front right, rear left, rear right)
🔧 Autel MaxiSys
⚠️ Controls power windows, mirrors, locks per door; removable doors require disconnect procedures
Trailer Brake Control Module (TBCM) 1.0 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Under rear cargo bed, passenger side frame rail
🔧 Autel MaxiSys
⚠️ Integrated trailer brake controller; 7,500 lb towing capacity (Edition 1: 7,500 lb; 2X/3X: 8,500-9,500 lb depending on configuration)
Parking Assist Control Module (PACM) 1.0 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Behind rear bumper, center position
🔧 Autel MaxiSys
⚠️ Manages ultrasonic parking sensors front and rear
UltraVision Underbody Camera Module (UVCM) 0.8 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Under front bumper, center position (additional cameras at corners and rear)
🔧 Autel MaxiSys
⚠️ Washable underbody cameras for off-road visibility; multiple camera units feed to SVCM
Seat Control Module (SCM) 0.8 hr R&R aftermarket tool +0.2 hr ▸ programming details
📍 Under each front seat (driver and passenger)
🔧 Autel MaxiSys
⚠️ Controls power seat adjustment, heating, ventilation, and massage functions; memory settings stored in BCM
Sensing and Diagnostic Module (SDM) 0.8 hr R&R security gateway +0.5 hr ▸ programming details
📍 Under center console, between front seats
🔧 GM SPS2
⚠️ Security gateway locked; VIN-specific; requires airbag system verification after coding
Vehicle Connectivity Module (VCM) 0.8 hr R&R security gateway +0.8 hr ▸ programming details
📍 Behind headliner, above rearview mirror
🔧 GM SPS2
⚠️ Provides OnStar, 5G connectivity, OTA updates, and Super Cruise communication; security gateway locked; subscription reactivation required
Headlamp Control Module (HCM) 0.8 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Integrated into each headlamp assembly (left and right)
🔧 Autel MaxiSys
⚠️ Controls adaptive LED headlamps with Infinity Roof lighting; sold as part of headlamp assembly
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?
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