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2024 GMC Hummer EV SUV

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By Research the Car 5 min read

Here’s a breakdown of common issues and complaints reported for the 2024 GMC Hummer EV SUV, categorized by major components, and following your specified format.

The 2024 GMC Hummer EV SUV is an all-electric supertruck known for its impressive off-road capabilities, advanced technology, and distinctive design. It comes with a variety of trims, all powered by electric motors, with configurations ranging from dual-motor to tri-motor setups. Horsepower figures vary depending on the configuration, reaching up to 1,000 hp and over 11,500 lb-ft of torque in the top-tier trims. Many owners appreciate the Hummer EV’s unique styling, rapid acceleration, and advanced features like Super Cruise. However, some common complaints include the vehicle’s considerable weight, limited range compared to some other EVs, and high price point. It also has issues with software glitches.

Electric Motor

Tri-Motor e4WD

  • Drive Motor Generator (DMG) Failure
    • Description/Symptoms: A popping or grinding noise can be heard when accelerating from a stop. Diagnostic trouble codes (DTCs) may indicate issues with the drive motor generator. The vehicle may experience reduced power or complete loss of drive.
    • Solution: Replacement of the drive motor generator (DMG) assembly is required. The redesigned DMG assembly has improved bearing and seal designs.
    • Estimated Cost to Fix: $8,000 - $12,000+
    • Recalls: None Found
  • Reduced Propulsion Power/Service High Voltage Charging System
    • Description/Symptoms: The vehicle displays a “Reduced Propulsion Power” message on the driver information center. Diagnostic codes relating to the high voltage battery system or drive motor inverters may be present. The vehicle may also display a “Service High Voltage Charging System” message. In some cases, the vehicle may not be able to charge.
    • Solution: Diagnosis by a certified EV technician is necessary to pinpoint the root cause. Potential fixes include software updates, replacement of the battery control module, or replacement of the drive motor inverter.
    • Estimated Cost to Fix: Varies greatly depending on the issue. Could be $500 for a software update to $5,000+ for inverter replacement.
    • Recalls: None Found

Battery Pack

  • Battery Management System (BMS) Software Issues
    • Description/Symptoms: Inaccurate state-of-charge readings, premature range reduction, or charging interruptions. Error messages related to battery health or charging system faults may be displayed.
    • Solution: Software updates to the BMS are typically deployed to address these issues. In some cases, individual battery modules may need to be replaced.
    • Estimated Cost to Fix: $0 - $500 for software updates (covered under warranty). Battery module replacement could range from $2,000 - $5,000+, depending on the module.
    • Recalls: None Found
  • Premature Battery Degradation
    • Description/Symptoms: Noticeable decline in range over a relatively short period of ownership, even with proper charging and driving habits.
    • Solution: Requires detailed battery health testing to determine the extent of degradation. Depending on the findings, battery module replacement or a full battery pack replacement may be necessary.
    • Estimated Cost to Fix: $5,000 - $25,000+, depending on the extent of the replacement and warranty coverage.
    • Recalls: None Found

Suspension

  • Air Suspension Compressor Failure
    • Description/Symptoms: The vehicle may sit lower than normal, exhibit uneven ride height, or display error messages related to the air suspension system. The compressor may make excessive noise or fail to activate.
    • Solution: Replacement of the air suspension compressor.
    • Estimated Cost to Fix: $1,200 - $2,000+
    • Recalls: None Found
  • Air Strut Leaks
    • Description/Symptoms: Similar to compressor failure, the vehicle may sag on one side, ride quality may suffer, and the air suspension system may generate error messages. A hissing sound may be audible near the affected strut.
    • Solution: Replacement of the leaking air strut.
    • Estimated Cost to Fix: $800 - $1,500+ per strut
    • Recalls: None Found

Electrical

  • Infotainment System Freezing/Rebooting
    • Description/Symptoms: The infotainment screen may freeze, become unresponsive to touch, or spontaneously reboot. This can affect navigation, audio, climate control, and other vehicle functions.
    • Solution: Software updates are the primary solution. In more severe cases, replacement of the infotainment system module may be required.
    • Estimated Cost to Fix: $0 for software updates. Module replacement could range from $800 - $2,000+.
    • Recalls: None Found
  • Software Glitches (General)
    • Description/Symptoms: Unexplained warning lights, erratic behavior of electronic features, and general software instability.
    • Solution: Software updates are the usual remedy.
    • Estimated Cost to Fix: $0 (covered under warranty)
    • Recalls: None Found
  • Charging Port Issues
    • Description/Symptoms: Difficulty connecting to or disconnecting from charging stations. Error messages related to charging port communication.
    • Solution: Inspection and potential replacement of the charging port assembly.
    • Estimated Cost to Fix: $500 - $1,200+
    • Recalls: None Found
  • 12V Battery Drain
    • Description/Symptoms: Vehicle fails to start due to a depleted 12V battery. May occur after the vehicle has been parked for a short period.
    • Solution: Diagnosis to identify the source of the parasitic drain. Potential fixes include software updates, replacement of faulty modules, or addressing aftermarket accessory installations.
    • Estimated Cost to Fix: $100 - $500+ depending on the cause
    • Recalls: None Found

Exterior

  • Tri-Fold Tonneau Cover Malfunctions (if equipped)
    • Description/Symptoms: The power tonneau cover may fail to open or close properly. It may get stuck or exhibit unusual noises during operation.
    • Solution: Inspection and repair or replacement of the tonneau cover motor, sensors, or mechanical components.
    • Estimated Cost to Fix: $500 - $2,000+
    • Recalls: None Found

Interior

  • Speaker System Issues
    • Description/Symptoms: Crackling noises, distorted sound, or complete failure of individual speakers.
    • Solution: Replacement of the faulty speakers.
    • Estimated Cost to Fix: $200 - $800+ per speaker (depending on location and type)
    • Recalls: None Found
  • Sunroof Leaks (if equipped)
    • Description/Symptoms: Water leaks from the sunroof area, especially during heavy rain or car washes.
    • Solution: Inspection and resealing of the sunroof assembly. In some cases, replacement of the sunroof seal or entire assembly may be required.
    • Estimated Cost to Fix: $300 - $1,500+
    • Recalls: None Found

Summary

The 2024 GMC Hummer EV SUV, while impressive, has been experiencing a variety of issues ranging from software glitches and battery problems to suspension and exterior component failures. The severity varies, with software glitches being relatively minor and easily addressed by updates, while issues like DMG or battery pack replacements can be very costly. The high potential cost of repairs, especially those related to the electric drivetrain and suspension, is something prospective buyers should consider. Many of these issues should be covered under the vehicle’s warranty.

GMC, Hummer EV SUV
GMC Hummer EV SUV 2024
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