2026 GMC Hummer EV SUV Problems: 3 Issues Every Owner Should Know

2026 model year · 280+ owner reports · Updated April 2026

According to Au7o's analysis of 280+ owner reports, the 2026 GMC Hummer EV SUV has 3 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 $0 to $1,500. DIY maintenance guides at au7o.io.

All 3 Known Issues

Filter:

Community Reported

120 owners

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)
View on Amazon
UpgradeAutomotive relay replacement set for common relay failures (Bosch Automotive Relay 5-Pin 12V)
View on Amazon
UpgradeDigital multimeter for diagnosing fuse, relay, and module electrical faults (Innova Digital Multimeter)
View on Amazon
UpgradeOEM-quality replacement sensor for accurate readings and proper system function (Bosch Replacement Sensor)
View on Amazon
UpgradeLevel 2 portable EV charger for reliable home or on-the-go charging (Lectron Portable Level 2 EV Charger)
View on Amazon

Typical repair cost:$0 - $0

Research This Issue

120+ owners have reported this issue

Google Reddit YouTube NHTSA

Community Reported

Low Confidence120 reportsLast reported by owners Mar 2026Reviewed Mar 2026

Community Reported

95 owners

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.

This issue also affects: Chevrolet Silverado EV, Ford Mustang Mach-E, Audi Q8 e-tron

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)
View on Amazon
UpgradeOEM-quality replacement battery with reliable performance (ACDelco Professional AGM Battery)
View on Amazon
UpgradeAutomatic battery maintainer to prevent parasitic drain issues during storage (Battery Tender Junior 12V Battery Charger Maintainer)
View on Amazon
UpgradePremium electrical tape for wiring repairs and harness wrapping (3M Super 33+ Vinyl Electrical Tape)
View on Amazon
UpgradeSplit wire loom tubing to protect repaired or exposed wiring harnesses (DEI Split Wire Loom Tubing)
View on Amazon
UpgradeWeatherproof terminal connector kit for reliable wiring repairs (Molex Automotive Terminal Connector Kit)
View on Amazon
UpgradeLevel 2 portable EV charger for reliable home or on-the-go charging (Lectron Portable Level 2 EV Charger)
View on Amazon

Typical repair cost:$0 - $500

Research This Issue

95+ owners have reported this issue

Google Reddit YouTube NHTSA

Community Reported

Low Confidence95 reportsLast reported by owners Mar 2026Reviewed Mar 2026

Community Reported

65 owners

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.

This issue also affects: Cadillac CT6, Chevrolet Malibu, Chevrolet Cobalt

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)
View on Amazon
UpgradeAir-to-coil spring conversion kit as a permanent fix for air suspension failures (Strutmasters Air Suspension Conversion Kit)
View on Amazon

Typical repair cost:$0 - $1,500

Research This Issue

65+ owners have reported this issue

Google Reddit YouTube NHTSA

Community Reported

Low Confidence65 reportsLast reported by owners Mar 2026Reviewed Mar 2026

Frequently Asked Questions

What are the most common GMC Hummer EV SUV problems?

According to Au7o's analysis of 280+ owner reports, the 2026-2026 GMC Hummer EV SUV has 3 documented issues. The most frequently reported are: Infotainment System Software Bugs and Screen Freezing, DC Fast Charging Speed Reduction and Charge Port Issues, Adaptive Air Suspension Calibration Errors and Extract Mode Failures. None are rated critical, but regular maintenance is recommended.

Is the GMC Hummer EV SUV reliable?

The 2026-2026 GMC Hummer EV SUV has 3 known issues documented across 280+ owner reports. No issues are rated critical, suggesting generally good reliability. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common GMC Hummer EV SUV problems?

Repair costs for known GMC Hummer EV SUV issues range from $0 to $1,500, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2024-2026 GMC Hummer EV SUV Infotainment System Software Bugs and Screen Freezing?

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, suspensio… Repairs typically run $0-$0. Severity: medium.

What is the 2024-2026 GMC Hummer EV SUV DC Fast Charging Speed Reduction and Charge Port Issues?

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 significa… Repairs typically run $0-$500. Severity: medium.

What is the 2024-2026 GMC Hummer EV SUV Adaptive Air Suspension Calibration Errors and Extract Mode Failures?

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… Repairs typically run $0-$1,500. Severity: medium.

2026 GMC Hummer EV SUV Problems: 3 Issues Every Owner Should Know

All 3 Known Issues

2024-2026 GMC Hummer EV SUV: Infotainment System Software Bugs and Screen Freezing#

Common Symptoms

How to Fix

What Owners Are Using

Research This Issue

2024-2026 GMC Hummer EV SUV: DC Fast Charging Speed Reduction and Charge Port Issues#

Common Symptoms

How to Fix

What Owners Are Using

Research This Issue

2024-2026 GMC Hummer EV SUV: Adaptive Air Suspension Calibration Errors and Extract Mode Failures#

Common Symptoms

How to Fix

What Owners Are Using

Research This Issue

Other GMC Models

Frequently Asked Questions

What are the most common GMC Hummer EV SUV problems?

Is the GMC Hummer EV SUV reliable?

How much does it cost to fix common GMC Hummer EV SUV problems?

What is the 2024-2026 GMC Hummer EV SUV Infotainment System Software Bugs and Screen Freezing?

What is the 2024-2026 GMC Hummer EV SUV DC Fast Charging Speed Reduction and Charge Port Issues?

What is the 2024-2026 GMC Hummer EV SUV Adaptive Air Suspension Calibration Errors and Extract Mode Failures?