Fitment notes: Auxiliary 12V battery; powers vehicle electronics and accessories when high-voltage EV system is off
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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 has decided that certain 2027 Chevrolet Bolt EV, 2025-2026 Cadillac OPTIQ, Chevrolet Colorado, Equinox EV, GMC Canyon, 2026 Buick Enclave, Envision, Cadillac CT5, Escalade, Escalade ESV, Escalade IQ, Escalade IQL, LYRIQ, VISTIQ, Chevrolet Blazer EV, Corvette Convertible, Corvette Coupe, Corvette Convertible E-Ray, Equinox, Silverado 1500, 2500, 3500, Silverado EV, Suburban 1500, Tahoe, Traverse, GMC Acadia, Hummer EV Pickup, Hummer EV SUV, Sierra 1500, 2500, 3500, Sierra EV, Terrain, Yukon, and Yukon XL vehicles. The radio may not have been set to the correct status to download the electronic owner's manual during production. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, “Occupant Protection.”
Consequence: Without an owner's manual to consult, owners may not know how to safely use and operate the vehicle, increasing the risk of injury in a crash.
Remedy: Dealers will reset the vehicle radio, which will facilitate automatic download of the electronic owner’s manual, free of charge. Owner notification letters were mailed April 16, 2026. Owners may contact GM customer service at 1-866-467-9700, Chevrolet customer service at 1-800-222-1020 or Cadillac customer service at 1-800-333-4223. The manufacturer's number for this recall is N252540430. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on February 26, 2026.
Wiper blades
2024-2026 Blazer EV uses same fitment. Rear wiper present on SUV body style.
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 2026 Chevrolet Blazer EV SS Dual 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.