Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2025 GMC HUMMER EV?

• Diagnostic fees are transparent and competitive; we often cost less than independent shops while delivering factory-level service.
• Initial scan typically covers code retrieval and a technician consultation; follow-up repairs vary by cause.
• Immediate savings come from accurate diagnostics and avoiding unnecessary parts; long-term savings come from correct repairs by factory-trained technicians.
• Repairs covered under warranty must be completed at a certified dealership to maintain coverage and ensure genuine parts and software updates.

What does it mean when the check engine light comes on in a 2025 GMC HUMMER EV?

• It signals the vehicle’s onboard system has detected a fault—anything from a minor sensor alert to a battery-management or charging issue.
• Common causes include charge-port faults, sensor or wiring issues, software alerts, or powertrain control irregularities specific to electric vehicles.
• An illuminated light is a prompt to diagnose; delaying can lead to degraded performance, reduced range, or safety concerns.
• Have our factory-trained technicians run a full diagnostic to identify root cause and recommend warranty-eligible or cost-effective repairs.

What is the first thing to check when the check engine light comes on?

• Confirm charging status and connection: ensure cables are fully seated and the charge level is normal.
• Check the instrument cluster for any companion warnings or messages and note symptoms like power loss or charging interruptions.
• Look for obvious issues—loose connectors, water in the charge port, or visible damage—then schedule a dealer diagnostic if unclear.
• For covered repairs, remember warranty work must be performed at a certified dealership to preserve coverage and ensure correct software updates.

What is the most common reason for check engine light on a 2025 GMC HUMMER EV?

• EV-specific sensors and battery-management alerts are frequent triggers—charge-port errors, BMS sensor irregularities, or communication faults.
• Sometimes a minor sensor or connector fault causes the light; other times it indicates charging or inverter-related issues that need prompt attention.
• Timely dealer diagnostics reduce risk of range loss or escalating repair costs; our factory-trained team isolates issues quickly and accurately.
• Warranty repairs must be completed at a certified dealership to guarantee long-term protection and proper software calibration.

How long does a check engine light service take?

• Initial diagnostics typically take one to two hours, depending on queue and symptom complexity; some issues are identified during the same visit.
• Minor repairs or software updates can often be completed within a day; more complex work—battery or inverter repairs—requires additional time and parts.
• Doing work with our dealership often reduces total downtime and cost by ensuring correct first-time fixes and warranty-covered procedures.
• We recommend scheduling service online so we can prepare parts and technicians, minimizing wait and delivering immediate and long-term savings.