Fitment notes: 12V auxiliary battery for vehicle systems; main traction battery is high-voltage lithium-ion EV battery pack
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Every control module on the 2023-2026 Chevrolet Blazer EV — 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.
Rear Electric Drive Unit Control Module (REDUPM)3.8 hr R&Rsecurity gateway +1.0 hrAWD models (RS, SS)▸ programming details
📍 Integrated with rear drive unit assembly under vehicle
🔧 GM SPS2 + Techline Connect
⚠️ Secondary traction motor controller for rear axle. Requires coordination programming with front EDUPM.
Heating Ventilation Air Conditioning Control Module (HVAC)2.8 hr R&Rdealer / factory tool +0.4 hr▸ programming details
📍 Behind center instrument panel, integrated with HVAC unit
🔧 GM SPS2
⚠️ Controls electric heat pump system (no engine coolant heat). Requires refrigerant recovery and recharge.
📍 Engine compartment, mounted to brake modulator assembly on left strut tower
🔧 GM SPS2 + Techline Connect
⚠️ Integrated with hydraulic control unit. Controls ABS, traction control, stability control, and regenerative braking coordination. Brake bleed and system test required after replacement.
Power Liftgate Module (PLG)1.2 hr R&Rdealer / factory tool +0.4 hrwith power liftgate▸ programming details
📍 Behind right side of instrument panel, near glove box
🔧 GM SPS2
⚠️ Provides OnStar, connected services, Wi-Fi hotspot, and OTA update capability. Subscription activation required.
Headlamp Control Module (HCM)0.6 hr R&Rrelearn only +0.2 hr▸ programming details
📍 Behind left headlamp assembly in engine compartment
🔧 GM SPS2 or Autel
⚠️ Controls LED headlamps, DRL, and automatic high beam. Auto-leveling calibration if equipped.
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.
General Motors, LLC (GM) is recalling certain 2024-2025 Chevrolet Blazer EV vehicles that may have been repaired incorrectly under recall 25V433. The rear parking brake wiring harness may become damaged or corroded, resulting in unintended activation of the parking brake or loss of the parking brake function.
Consequence: Unintended activation of the parking brake while driving increases the risk of a crash. Loss of the parking brake function while parked can result in a rollaway, increasing the risk of a crash.
Remedy: Dealers will replace the chassis harness, free of charge. Owner notification letters were mailed on February 25, 2026. Owners may contact Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N252532830.
PARKING BRAKE · 25V433000
2025-06-25
General Motors, LLC (GM) is recalling certain 2024-2025 Chevrolet Blazer EV vehicles. The rear parking brake wiring harness may become damaged or corroded, resulting in unintended activation of the parking brake or loss of the parking brake function.
Consequence: Unintended activation of the parking brake while driving increases the risk of a crash. Loss of the parking brake function while parked can result in a rollaway, increasing the risk of a crash.
Remedy: Dealers will inspect the harness and, if necessary, reroute the harness and install anti-abrasive tape. Any harness that has existing damage will be replaced. Repairs will be performed free of charge. Owner notification letters were mailed on October 1, 2025. Owners may contact Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N252503010.
LATCHES/LOCKS/LINKAGES:DOORS:LATCH · 24V737000
2024-10-02
General Motors, LLC (GM) is recalling certain 2025 Chevrolet Blazer, Blazer EV, and Equinox vehicles. The door strikers were not properly heat-treated, which can cause them to break.
Consequence: A broken door striker can cause the door to open unexpectedly, increasing the risk of injury.
Remedy: Dealers will replace all four side door strikers and attachment bolts, free of charge. All affected vehicles are still in dealership inventory and therefore no owner notification letters are expected to be mailed. Owners may call Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N242477131.
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 Chevrolet Blazer EV LT Single Motor RWD 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.