Every control module on the 2020-2026 Cadillac CT5-V — 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.
Transmission Control Module (TCM) 3.5 hr R&R security gateway +1.0 hr ▸ programming details
📍 Integrated into transmission assembly, driver side of 10-speed automatic transmission case
🔧 GDS2 via Techline Connect
⚠️ Requires transmission fluid drain; VIN and ECM pairing required; adaptive shift relearn procedure mandatory
Heating, Ventilation and Air Conditioning Control Module (HVAC) 3.0 hr R&R dealer / factory tool +0.5 hr ▸ programming details
📍 Behind instrument panel, center stack, integrated with HVAC unit
🔧 GDS2 via Techline Connect or Autel MaxiSys
⚠️ Dual-zone or tri-zone system depending on trim; actuator calibration required after replacement
Electric Power Steering Control Module (EPSCM) 2.5 hr R&R security gateway +0.8 hr ▸ programming details
📍 Integrated into steering column assembly, below instrument panel
🔧 GDS2 via Techline Connect
⚠️ Steering angle sensor calibration required; vehicle must be on alignment rack with wheels straight
Body Control Module (BCM) 2.0 hr R&R security gateway +1.2 hr ▸ programming details
📍 Behind instrument panel, center stack area, above center console
🔧 GDS2 via Techline Connect
⚠️ Controls all body functions; requires complete vehicle configuration programming including option codes; all accessory relearns needed
Electronic Brake Control Module (EBCM) 1.5 hr R&R dealer / factory tool +0.8 hr ▸ programming details
📍 Engine compartment, driver side inner fender area near brake master cylinder
🔧 GDS2 via Techline Connect or Autel MaxiSys with AutoAuth
⚠️ Brake system bleed required after replacement; VIN programming and brake pedal position sensor calibration mandatory
Surround Vision Camera Module (SVCM) 1.5 hr R&R dealer / factory tool +0.8 hr ▸ programming details
📍 Behind infotainment display or integrated with ICM, center stack
🔧 GDS2 via Techline Connect
⚠️ 360-degree camera system; camera alignment and calibration required; multiple camera inputs
Gateway Module (GM) 1.5 hr R&R security gateway +1.5 hr ▸ programming details
📍 Behind instrument panel, center area, near BCM
🔧 GDS2 via Techline Connect
⚠️ Security gateway; controls all module communication; replacement requires complete vehicle reprogramming of all modules
Infotainment Control Module / Cadillac User Experience (ICM/CUE) 1.5 hr R&R dealer / factory tool +0.8 hr ▸ programming details
📍 Behind center stack touchscreen display, center of instrument panel
🔧 GDS2 via Techline Connect
⚠️ 10-inch touchscreen standard; OnStar and navigation configuration required; audio system calibration needed
Door Control Module (DCM) 1.2 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Inside door panels, one per door, lower section near latch
🔧 GDS2 or Autel MaxiSys
⚠️ Window auto-up/down calibration required; soft-close door feature on some trims
Engine Control Module (ECM) 1.2 hr R&R security gateway +1.0 hr ▸ programming details
📍 Engine compartment, driver side firewall area, mounted to intake manifold or firewall bracket
🔧 GDS2 via Techline Connect or J2534 pass-thru with GM subscription
⚠️ VIN programming and security gateway unlock required; 3.0L twin-turbo V6 specific calibration
OnStar Communication Module (VCIM) 1.2 hr R&R security gateway +1.0 hr ▸ programming details
📍 Behind headliner, center roof area near rearview mirror, or behind rear seat
🔧 GDS2 via Techline Connect
⚠️ OnStar subscription activation required; cellular antenna connection critical; 4G LTE module
Sensing and Diagnostic Module (SDM) 1.0 hr R&R security gateway +0.5 hr ▸ programming details
📍 Center console area, below center stack, mounted to floor tunnel
🔧 GDS2 via Techline Connect
⚠️ Crash data must be cleared; all airbag sensors and seat belt pretensioners must be verified; battery disconnect required
Instrument Panel Cluster (IPC) 1.0 hr R&R security gateway +0.8 hr ▸ programming details
📍 Behind instrument panel, driver side, in cluster housing
🔧 GDS2 via Techline Connect
⚠️ Mileage programming required; VIN and vehicle configuration must be transferred from old module
Remote Control Door Lock Receiver (RCDLR) 1.0 hr R&R security gateway +0.5 hr ▸ programming details
📍 Behind instrument panel, center stack area, or integrated with BCM
🔧 GDS2 via Techline Connect
⚠️ All key fobs must be reprogrammed; passive entry system relearn required
Amplifier Control Module (AMP) 1.0 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Trunk area, driver side, mounted to body structure
🔧 GDS2 or Autel MaxiSys
⚠️ Premium audio system (AKG Studio Reference); audio calibration recommended after replacement
Parking Assist Control Module (PACM) 1.0 hr R&R aftermarket tool +0.4 hr ▸ programming details
📍 Rear of vehicle, behind rear bumper cover, center area
🔧 GDS2 or Autel MaxiSys
⚠️ Ultrasonic sensors; front and rear parking assist; sensor calibration required
Magnetic Ride Control Module (MRCM) 1.0 hr R&R dealer / factory tool +0.5 hr ▸ programming details
📍 Rear cargo area, driver side, mounted to body structure near shock tower
🔧 GDS2 via Techline Connect
⚠️ Standard on CT5-V; controls adaptive dampers; ride height sensor calibration may be needed
Seat Control Module (SCM) 0.8 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Under front seats, driver and passenger side, mounted to seat frame
🔧 GDS2 or Autel MaxiSys
⚠️ Heated/ventilated/massage seat functions; memory seat position relearn required
Fuel Pump Control Module (FPCM) 0.8 hr R&R relearn only +0.2 hr ▸ programming details
📍 Rear of vehicle, above fuel tank, driver side frame rail
🔧 GDS2 or Autel MaxiSys
⚠️ Simple relearn procedure; fuel system pressure relief required before service
Rear Radar Sensor Module (RRSM) 0.8 hr R&R dealer / factory tool +0.8 hr ▸ programming details
📍 Rear bumper cover, driver and passenger side corners, behind bumper
🔧 GDS2 via Techline Connect
⚠️ Blind spot monitoring and rear cross traffic alert; two modules (left and right); calibration required
Headlamp Control Module (HCM) 0.5 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Engine compartment, behind headlamp assemblies, one per side
🔧 GDS2 or Autel MaxiSys
⚠️ LED headlamps standard; adaptive lighting calibration may be needed on higher trims
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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