Frequently Asked Questions

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

• Check for an easily fixed issue first, such as a loose or missing gas cap—this common EVAP fault can trigger the light.
• Note vehicle details: 2025 GMC Sierra 1500 owners should confirm fuel cap seating and inspect for obvious leaks or smells.
• If the cap is secure and the light stays on, bring the truck to Coggin Buick/GMC of Orange Park for a professional scan.
• We offer factory-trained technicians who perform precise diagnostics; warranty-covered repairs must be performed at a certified dealership to retain coverage.
• Choosing our dealership often costs less than independent shops when factoring immediate fixes, accurate diagnosis, and long-term savings from preventing larger failures.

How long does a check engine light service take?

• Initial diagnostic scan for a 2025 GMC Sierra 1500 typically takes 30–60 minutes to read codes and assess conditions.
• Minor repairs like swapping a faulty sensor or tightening a cap can often be completed the same day.
• Complex issues—misfires or catalytic converter complaints—may require parts ordering and additional time; we provide clear timelines and updates.
• Factory-trained technicians at Coggin Buick/GMC of Orange Park follow OEM procedures, reducing rework and saving you time and money in the long run.
• Warranty repairs must be completed at a certified dealership to ensure coverage and proper record-keeping.

How much does a check engine light diagnostic cost for a 2025 GMC Sierra 1500?

• Typical diagnostic fees range from about $89 to $199 depending on inspection depth; final pricing is provided before work begins.
• At Coggin Buick/GMC of Orange Park, our transparent pricing and factory diagnostics often deliver immediate and long-term savings compared with independent shops.
• If the issue is covered under warranty, the diagnostic and repair may be covered—repairs must be done at a certified dealership to maintain that warranty.
• We include a clear estimate for parts and labor so you understand total cost and avoid surprises.

What does it mean when the check engine light comes on in a 2025 GMC Sierra 1500?

• The light signals that the vehicle’s onboard diagnostics have detected a system that is out of expected parameters—anything from emissions, fuel delivery, ignition, to sensor failures.
• Common causes include loose gas cap, oxygen sensor failure, fuel trim issues, misfires, or EVAP system leaks.
• We recommend a prompt scan at Coggin Buick/GMC of Orange Park to identify codes and prevent minor issues from becoming expensive repairs.
• Certified dealership service preserves warranty rights and provides factory-level repairs that often result in lower lifetime ownership costs.

What is the most common reason for check engine light on a 2025 GMC Sierra 1500?

• One of the most frequent causes is a failing oxygen sensor or an EVAP system leak—loose gas caps are a simple but common trigger.
• Other common causes include ignition misfires caused by spark plugs, coils, or fuel delivery irregularities.
• Ignoring these warnings can lead to catalytic converter damage, reduced fuel economy, and higher repair costs down the road.
• Bringing your truck to Coggin Buick/GMC of Orange Park ensures an accurate diagnosis by factory-trained technicians who help you save immediately and long-term.