Frequently Asked Questions

How long does a check engine light service take?

• Initial scan and code read typically take 20–40 minutes using our dealer-grade diagnostic tools.
• Simple fixes, like tightening a gas cap or clearing stored codes, can be completed same day.
• Repairs requiring parts or deeper diagnostics often require additional time—expect 1–4 hours for common repairs; complex engine or emissions work may take longer.
• We prioritize factory-trained technicians and OEM parts, which helps avoid repeat visits and delivers immediate and long-term savings compared with many independent shops.
• Warranty-covered repairs must be performed at a certified dealership to preserve coverage and vehicle value.

What does it mean when the check engine light comes on in a 2026 GMC Yukon?

• The light signals a stored diagnostic trouble code; causes range from a loose fuel cap to oxygen sensor or misfire issues.
• Some codes indicate emissions system issues such as EVAP leaks, catalyst efficiency losses, or sensor failures.
• Driving symptoms (reduced power, rough idle, stalling) help prioritize urgency; a flashing light denotes a severe condition needing immediate attention.
• Our dealership scans codes with OEM-level tools and explains repair options, often saving customers money over time through correct repairs and proper parts.
• If a repair is warranty-covered, it must be completed at a certified dealership like Coggin Buick/GMC of Orange Park to retain coverage.

How much does a check engine light diagnostic cost for a 2026 GMC Yukon?

• Diagnostic fees vary, but typical dealer diagnostic scans commonly range from $89–$149 depending on the depth of testing.
• If a repair is covered by warranty, diagnostic or repair costs may be covered when completed at a certified dealership.
• Repair costs depend on the code: sensors and small components are lower cost, while catalytic or engine repairs are higher.
• Coggin Buick/GMC of Orange Park often delivers immediate and long-term savings versus independent shops by using factory procedures and preventing repeat repairs.
• Ask about current service specials and our transparent estimates before work begins to plan your budget.

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

• Check for other dashboard warnings and note any drivability changes like rough idle or loss of power.
• Ensure the fuel cap is tight—loose or faulty caps are a common, inexpensive cause of codes.
• If the light is flashing or the vehicle runs poorly, stop driving and have the Yukon inspected or towed to the dealership to avoid further damage.
• A professional code scan at our service center is the right next step; resetting the light without diagnosis can hide issues and risk warranty coverage.
• For warranty repairs, certified dealership service is required to preserve coverage and ensure proper OEM repairs.