Frequently Asked Questions

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

• We provide transparent diagnostic fees that often cost less than independent shops while delivering factory-trained technicians, OEM tools, and genuine parts.
• Diagnostic pricing covers full system scans, software checks, and a detailed estimate so you avoid surprise charges and unnecessary repairs.
• Immediate savings come from accurate diagnosis and prompt fixes; long-term savings come from preventing repeat visits, preserving range, and avoiding major component failure.
• Any work covered under warranty must be performed at a certified dealership to keep coverage valid and ensure proper parts and procedures.

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

• On an electric Sierra EV, the light flags a monitored system fault—common areas include battery management, charging circuits, motor inverter, thermal systems, or 12‑volt electronics.
• Severity varies: some messages are informational, while others may restrict performance or charging to protect components.
• Modern EV diagnostics can capture predictive codes that let us intervene before failures escalate, saving you time and money.
• Certified diagnostics at our dealership preserve warranty eligibility and ensure the correct repairs are completed with OEM parts.

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

• If the light accompanies a red warning or severe message, stop driving and call us—safety and preventing further damage are first priorities.
• For less urgent alerts, verify the charging connector is secure and any onboard messages or alerts displayed on the dash.
• Try a safe restart; if the light persists, schedule a diagnostic so factory software and logs can be read by our certified technicians.
• Remember: warranty-covered repairs must be performed at a certified dealership to maintain coverage and proper calibrations.

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

• Frequent causes include charging interruptions, battery management system alerts, sensor communication errors, or software glitches that affect drivetrain electronics.
• Other common issues are 12‑volt accessory battery problems or thermal management warnings that limit power to protect components.
• Left unaddressed, these issues can reduce range, trigger limp modes, or cause charging failures—early dealer diagnostics prevent larger repair bills.
• Our certified technicians use OEM software and updates to pinpoint root causes and maintain your warranty and vehicle performance.

How long does a check engine light service take?

• Most diagnostic sessions take about 1–2 hours, depending on whether we need extended data logging, guided road testing, or additional inspections.
• Minor fixes or sensor replacements are often same‑day; more complex repairs—battery conditioning, inverter work, or ordered parts—may extend service time.
• We focus on efficient scheduling and accurate repairs to avoid repeat visits, which delivers immediate cost savings and long‑term value.
• Warranty work must be completed at a certified dealership to ensure parts, procedures, and warranty remain intact.