2024-2026 GMC Hummer EV SUV Problems: 4 Issues Every Owner Should Know
2024-2026 model years · 280+ owner reports · Updated May 2026
According to Au7o's analysis of 280+ owner reports, the 2024-2026 GMC Hummer EV SUV has 4 documented known issues. No issues are rated critical, indicating generally reliable ownership. The most commonly reported issue is Infotainment System Software Bugs and Screen Freezing with 120 owner reports. Across all issues, repair costs range from $ to $1,500. DIY maintenance guides at au7o.io.
All 4 Known Issues
On the 2024-2026 GMC Hummer EV SUV, the Hummer EV SUV's 13.4-inch infotainment touchscreen and 12.3-inch driver information center experience software bugs including screen freezing, random reboots, and unresponsive touch inputs. The system controls critical vehicle functions including charging schedules, suspension mode selection, CrabWalk, and Extract Mode. Early software versions had particular issues with Bluetooth connectivity, Apple CarPlay/Android Auto disconnections, and the rear camera feed freezing.
Common Symptoms
- Touchscreen frozen and unresponsive
- System rebooting while driving
- Apple CarPlay or Android Auto disconnecting frequently
- Rear camera feed frozen or black
- Climate controls inaccessible during screen freeze
How to Fix
Ensure the latest OTA software update is installed — GM has released multiple updates addressing infotainment stability. Perform a system reset by holding the power/volume button for 10 seconds. If issues persist, the dealer can perform a full system reflash. Some early production units required infotainment module hardware replacement under warranty.
What Owners Are Using
Parts and tips from 120+ owners who fixed this issue
- TipCheck for OTA updates in Settings > Software Update — GM has released several updates that significantly improve system stability
- TipHold the power/volume knob for 10 seconds to force a system reboot — this clears most temporary freezes
- TipIf Bluetooth or CarPlay disconnects frequently, delete and re-pair your phone — software updates can corrupt the pairing profile
- UpgradeProfessional OBD-II diagnostic scanner for reading infotainment and body module codes (BlueDriver Bluetooth Pro OBD2 Scan Tool)
- UpgradeAutomotive relay replacement set for common relay failures (Bosch Automotive Relay 5-Pin 12V)
- UpgradeDigital multimeter for diagnosing fuse, relay, and module electrical faults (Innova Digital Multimeter)
- UpgradeOEM-quality replacement sensor for accurate readings and proper system function (Bosch Replacement Sensor)
- UpgradeLevel 2 portable EV charger for reliable home or on-the-go charging (Lectron Portable Level 2 EV Charger)
On the 2024-2026 GMC Hummer EV SUV, some Hummer EV SUVs experience slower-than-expected DC fast charging speeds and intermittent charge port communication failures. The vehicle's 800V architecture should support 350 kW charging, but software limitations and battery temperature management can reduce speeds significantly. The charge port door actuator can also fail, preventing the port from opening. CCS connector fit issues at some public charging stations cause the vehicle to reject the charge session.
Common Symptoms
- DC fast charging capping at 100-150 kW instead of 350 kW
- Charge port door not opening
- Charging session ending prematurely
- Unable to initiate charging at some stations
- Battery preconditioning not activating before arrival at charger
How to Fix
Pre-condition the battery for DC fast charging by enabling the "target charge station" feature in navigation — this warms the battery to optimal temperature before arrival. Ensure the latest OTA software update is installed, as GM has improved charging algorithms. For charge port door issues, the actuator can be replaced under warranty. Try multiple charger brands if one consistently fails to connect.
What Owners Are Using
Parts and tips from 95+ owners who fixed this issue
- TipUse the navigation system to route to a DC fast charger — this activates battery preconditioning automatically, which can double your charging speed
- TipIf a charger won't connect, try firmly seating the CCS connector and holding it while the vehicle handshakes — some station connectors are loose fitting
- TipInstall all OTA updates — GM has released charging speed improvements that increase peak charging rates
- UpgradeHigh-performance AGM battery with excellent cold cranking amps and deep cycle capability (Optima RedTop AGM Battery)
- UpgradeOEM-quality replacement battery with reliable performance (ACDelco Professional AGM Battery)
- UpgradeAutomatic battery maintainer to prevent parasitic drain issues during storage (Battery Tender Junior 12V Battery Charger Maintainer)
- UpgradePremium electrical tape for wiring repairs and harness wrapping (3M Super 33+ Vinyl Electrical Tape)
- UpgradeSplit wire loom tubing to protect repaired or exposed wiring harnesses (DEI Split Wire Loom Tubing)
- UpgradeWeatherproof terminal connector kit for reliable wiring repairs (Molex Automotive Terminal Connector Kit)
- UpgradeLevel 2 portable EV charger for reliable home or on-the-go charging (Lectron Portable Level 2 EV Charger)
On the 2024-2025 GMC Hummer EV SUV, dC fast charging sessions terminate prematurely or fail to initiate at certain charger networks. Communication errors between the vehicle and charger can prevent charging above 80% or cause sessions to stop repeatedly.
Common Symptoms
- Charging session stops unexpectedly
- Unable to initiate DC fast charge
- Charging speed drops to zero
- Error message on charger screen
How to Fix
Ensure vehicle software is updated. Try different CCS charger brands if one consistently fails. Precondition the battery before DC fast charging by using the "Target Charger" feature in navigation. Dealer can update the charge port module firmware.
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- UpgradeHigh-performance AGM battery with excellent cold cranking amps and deep cycle capability (Optima RedTop AGM Battery)
- UpgradeOEM-quality replacement battery with reliable performance (ACDelco Professional AGM Battery)
- UpgradeAutomatic battery maintainer to prevent parasitic drain issues during storage (Battery Tender Junior 12V Battery Charger Maintainer)
- UpgradeAutomotive relay replacement set for common relay failures (Bosch Automotive Relay 5-Pin 12V)
- UpgradeDigital multimeter for diagnosing fuse, relay, and module electrical faults (Innova Digital Multimeter)
- UpgradeLevel 2 portable EV charger for reliable home or on-the-go charging (Lectron Portable Level 2 EV Charger)
On the 2024-2026 GMC Hummer EV SUV, the Hummer EV SUV's adaptive air suspension system, which offers up to 16 inches of ground clearance in Extract Mode, can develop calibration errors that prevent the system from reaching full height. The height sensors, air compressor, and air springs must all function in concert. Software bugs can cause the system to display incorrect ride height or refuse to enter Extract Mode. The compressor can also overheat from repeated height adjustment cycles, entering a cooldown period that locks out suspension adjustments.
Common Symptoms
- Extract Mode not reaching full height
- Suspension malfunction warning message
- Vehicle sitting unevenly
- Ride height adjustments not responding
- Compressor cooldown message after multiple height changes
How to Fix
GM has released software updates that improve air suspension calibration accuracy. Visit the dealer for recalibration using the GDS2 diagnostic tool. If the compressor overheats, allow it to cool for 30 minutes before attempting further adjustments. For persistent Extract Mode failures, the height sensors may need recalibration or replacement.
What Owners Are Using
Parts and tips from 65+ owners who fixed this issue
- TipAllow the compressor to cool for 30 minutes if you get the cooldown message — rapid repeated height adjustments overheat the compressor
- TipVisit the dealer for a GDS2 air suspension recalibration if ride height seems incorrect — this often resolves Extract Mode failures
- TipKeep the latest OTA software installed — GM has released multiple calibration improvements for the adaptive air suspension system
- UpgradeReplacement air spring to restore proper ride height and comfort (Arnott Air Spring Assembly)
- UpgradeAir-to-coil spring conversion kit as a permanent fix for air suspension failures (Strutmasters Air Suspension Conversion Kit)