The 2024 Blazer EV is GM's Ultium-based mid-size electric crossover that shares its platform with the Cadillac Lyriq. Being first-model-year, early production units have shown software glitches, thermal management issues, and some concerning drive unit failures that are atypical for EVs this new.
Drive Unit (Electric Motor/Transmission) Failures
Occasional · high severity
Typical onset: 5,000-25,000 mi
Symptoms: Grinding or whining noise from front or rear axle during acceleration, Loss of power or limp mode with drivetrain error messages, Clunking when shifting between drive and reverse, Complete loss of propulsion requiring tow
Fix: Complete drive unit replacement under warranty for most cases. Involves dropping the subframe, disconnecting HV cables, and R&R of the integrated motor/gearbox assembly. 8-12 hours labor if you're paying out-of-pocket post-warranty. Some failures traced to inadequate drive unit fluid or contamination during assembly.
Estimated cost: $8,000-15,000
Electronic Parking Brake Malfunctions
Common · medium severity
Symptoms: Parking brake applies and won't release, trapping vehicle, Warning light stays illuminated with 'Service Parking Brake' message, Intermittent failure to engage when parking on incline, Grinding noise from rear calipers when applying parking brake
Fix: Two recalls issued for this (NHTSA 24V-404 and 24V-577). Dealer reflash of brake module software resolves most cases. Physical caliper replacement needed in about 20% of cases where actuator motor fails. 1.5-3 hours labor depending on whether it's software or hardware.
Estimated cost: $0 (recall) or $600-1,200
High-Voltage Battery Thermal Management Issues
Occasional · high severity
Symptoms: Reduced charging speed with 'Battery Conditioning' message in hot or cold weather, Loss of 30-50% range in winter beyond normal EV cold-weather loss, Battery overheating warnings during fast charging sessions, Coolant leaks visible under vehicle from battery pack area
Fix: Software updates address some thermal calibration issues, but physical coolant leaks require battery pack removal and seal replacement or individual module R&R. Battery pack drop is 6-8 hours alone, then add module/seal work. GM has issued TSBs for coolant system bleeding procedures that techs often miss.
Estimated cost: $1,500-4,000 (seals/software) or $12,000+ (module replacement)
Infotainment System Freezes and Electrical Gremlins
Common · low severity
Symptoms: Black screen on startup requiring hard reset (holding power+volume for 30 seconds), Android Auto/Apple CarPlay disconnecting randomly, 12V battery draining when parked, causing failure to start, Phantom warnings for door ajar or seatbelt when nothing is wrong
Fix: Multiple OTA updates have been pushed but don't fix all units. Dealer reflash of infotainment and body control modules takes 2-3 hours. Some cases require 12V battery replacement (which is separate from the HV pack) due to drain issues from faulty wiring harness near front door jamb (NHTSA 24V-550).
Estimated cost: $0-800
Front Lower Control Arm Bolts Loosening
Rare · high severity
Typical onset: 2,000-8,000 mi
Symptoms: Clunking from front suspension over bumps, Steering pull or wandering at highway speeds, Visible gap or movement at control arm mounting point, In extreme cases, complete separation causing loss of control
Fix: NHTSA recall 24V-324 covers this—improperly torqued bolts from factory. Dealer inspection and re-torque to spec, or replacement of control arms if threads damaged. 1.5 hours per side. Critical safety issue if ignored.
Estimated cost: $0 (recall) or $800-1,400
Charge Port Door and Latch Failures
Occasional · low severity
Symptoms: Charge door won't open electronically, requiring manual release, Door won't stay closed, flapping while driving, J1772 or CCS connector won't lock into port properly, Ice buildup preventing door operation in winter
Fix: Door actuator motor or latch mechanism replacement. Access requires removing inner fender liner. 1.5-2 hours labor. GM has revised latch design mid-production year. Some owners report aftermarket weatherstripping helps prevent ice issues.
Estimated cost: $400-700
Owner tips
Get all recalls done immediately—the control arm and parking brake issues are safety-critical
If buying used, verify drive unit fluid was changed at least once (some dealers skip this despite TSB recommendations at 15K mi for early units)
Budget for OTA-capable internet connectivity; many fixes are software that you'll want ASAP
Check manufacture date—units built after March 2024 have fewer early-production gremlins
Use scheduled departure preconditioning religiously in winter to preserve battery and range
Wait for a 2025+ model year or get a screaming deal on a 2024—too many first-year bugs for a $50K+ vehicle, though most are warranty-covered if you buy CPO.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
Fitment notes: 12V auxiliary battery; electric vehicle with no starter function
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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.
SUSPENSION:FRONT:CONTROL ARM:LOWER ARM · 24V487000
2024-06-28
General Motors, LLC (GM) is recalling certain 2024 Chevrolet Blazer EV vehicles. The right front lower control arm may contain a manufacturing defect that can cause it to fracture.
Consequence: A lower control arm fracture can cause loss of vehicle control, increasing the risk of a crash.
Remedy: Dealers will inspect and replace the right front lower control arm as necessary, free of charge. Owner notification letters were mailed July 24, 2024. Owners may contact Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N242448540.
ELECTRICAL SYSTEM:WIRING · 24V320000
2024-05-09
General Motors, LLC (GM) is recalling certain 2024 Cadillac Lyriq, Chevrolet Blazer EV, Chevrolet Silverado EV, GMC Hummer EV SUV, and GMC Sierra EV vehicles. The electric motors in the rear drive units may have insufficiently insulated wires that can contact each other, resulting in a loss of drive power.
Consequence: A loss of drive power increases the risk of a crash.
Remedy: Dealers will replace the rear drive unit, free of charge. Owner notification letters were mailed May 16, 2024. Owners may contact Chevrolet customer service at 1-800-222-1020; Cadillac customer service at 1-800-458-8006; Hummer customer service at 1-800-732-5493; or GMC customer service at 1-800-462-8782. GM's number for this recall is N242447080.
STRUCTURE:BODY:DOOR · 23V869000
2023-12-21
General Motors, LLC (GM) is recalling certain 2024 Chevrolet Blazer, Blazer EV, Equinox, and GMC Terrain vehicles. The door strikers may fracture, resulting in the door opening unexpectedly.
Consequence: A door opening while the vehicle is being driven can increasing the risk of injury or a crash.
Remedy: Dealers will replace all four door strikers and attaching bolts, free of charge. Owner notification letters were mailed January 24, 2024. Owners may contact Chevrolet customer service at 1-800-222-1020 and GMC customer service at 1-800-462-8782. GM's number for this recall is N232429911.
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 2024 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.