Frequently Asked Questions

What does it mean when the check engine light comes on in a 2021 Chevrolet Silverado 2500HD Custom?

• The check engine light signals your truck's onboard diagnostics detected an issue — anything from a loose gas cap to a serious emissions or engine fault on the 2021 Chevrolet Silverado 2500HD Custom.
• At Stevinson Chevrolet in CO, our factory-trained technicians run a full scan to identify the exact fault code, explain the cause, and recommend the right repair with OEM parts for long-term reliability.
• Choosing the dealership often costs less than independent shops when you factor in accurate diagnostics, precise repairs, and warranties that protect against repeat failures — immediate and long-term savings.
• If a repair is covered under warranty, it must be completed at a certified dealership to preserve coverage; our team handles warranty work and explains coverage clearly.
• To get a professional diagnosis, schedule service online or review our current service specials for savings.

How long does a check engine light service take?

• Most diagnostics on a 2021 Chevrolet Silverado 2500HD Custom take 30–90 minutes depending on the issue and whether road testing or component inspection is needed.
• Repairs vary — a simple sensor swap may be finished the same day; complex repairs can take longer. We provide an estimated timeline before any work begins.
• Stevinson Chevrolet prioritizes quick turnaround with OEM parts and certified technicians, reducing repeat visits and saving you time and money over the life of the truck.
• We offer service financing so you can get repairs done now and pay later, and our team will explain immediate costs and long-term value up front.
• To confirm availability and timing, please schedule service online or check our latest service specials.

How much does a check engine light diagnostic cost for a 2021 Chevrolet Silverado 2500HD Custom?

• Basic diagnostics at Stevinson Chevrolet start competitively and often cost less than independent shops when you account for accurate diagnosis, OEM parts, and warranty protection.
• We emphasize immediate savings through precise repairs that prevent repeat failures and long-term savings through extended component life and covered warranty work.
• If additional parts or labor are required we will provide a clear estimate before proceeding; warranty repairs must be completed at a certified dealership to remain valid.
• We also offer service financing so you can address issues now without delaying important repairs that protect resale value.
• Book a diagnostic appointment anytime — schedule service online and review current discounts via our service specials.

What is the most common reason for check engine light on a 2021 Chevrolet Silverado 2500HD Custom?

• Common causes include faulty oxygen sensors, loose or damaged gas caps, catalytic converter issues, and mass airflow or EVAP system faults — each triggers specific trouble codes for our technicians to read.
• Ignoring these codes can lead to reduced fuel economy, higher emissions, and more costly engine or exhaust repairs over time — servicing early saves money and avoids downtime.
• At Stevinson Chevrolet, our certified techs diagnose the root cause, use OEM parts, and document the long-term benefits of the repair so you understand the value.
• Warranty repairs must be done at a certified dealership to stay valid — we handle those seamlessly and transparently.
• To protect your Silverado’s performance and efficiency, schedule service and check our service specials for savings.

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

• First check for an obvious issue like a loose gas cap or low fluids; then bring your 2021 Chevrolet Silverado 2500HD Custom to the dealership for a professional scan to read diagnostic trouble codes.
• Our technicians use OEM-level scanners and follow GM repair procedures to ensure accurate fault isolation and correct repairs the first time.
• Using the dealership protects warranty coverage and delivers long-term savings by preventing misdiagnosis and unnecessary repairs.
• We offer flexible payment options including service financing to get you back on the road without delay.
• When you’re ready, schedule service or view our service specials for current offers.