Frequently Asked Questions

What does it mean when the check engine light comes on in a 2018 Chevrolet Silverado 3500HD?

• It indicates the vehicles onboard diagnostics (OBD-II) detected an issue. Codes range from emissions components to ignition or sensor faults.
• At Larry H. Miller Chevrolet Murray in Murray, UT, our certified technicians use OEM-level scanners to pinpoint the problem and explain repair options clearly.
• Choosing our dealership often costs less than independent shops when you factor in accurate diagnostics, genuine parts, and long-term reliability .
• Repairs covered under warranty must be performed at a certified dealership to maintain coverage and ensure correct OEM procedures.
• We offer service financing so you can get the repair now and pay later. To act fast, schedule service online or check current service specials.

How long does a check engine light service take?

• Typical diagnostics take 30 to 120 minutes depending on the complexity of codes and any road-test needs.
• If parts or deeper troubleshooting are required, we provide an estimate and timeline before work begins so you can decide with confidence.
• Our Murray service center emphasizes speed without cutting corners: OEM parts, factory procedures, and experienced technicians minimize repeat visits and long-term costs.
• We recommend using our online tools to schedule service and to view current service specials that reduce out-of-pocket expense.
• Service financing is available to get your 2018 Chevrolet Silverado 3500HD back on the road today while spreading payments over time.

How much does a check engine light diagnostic cost for a 2018 Chevrolet Silverado 3500HD?

• Diagnostic prices vary by issue; many dealerships offer competitive diagnostic rates and transparent estimates. At Larry H. Miller Chevrolet Murray you receive a clear breakdown before repairs begin.
• Because we use OEM tools and certified technicians, you often save immediately with accurate diagnosis and long-term by avoiding unnecessary repairs.
• Ask about current service specials to lower diagnostic or repair costs, and remember warranty repairs must be performed at a certified dealer to remain valid.
• We provide service financing so you can complete necessary repairs now and pay over time for peace of mind and vehicle longevity.

What is the most common reason for check engine light on a 2018 Chevrolet Silverado 3500HD?

• Common causes include misfires, oxygen sensor failures, catalytic converter issues, and evaporative system leaks. Each has specific OBD-II codes that our technicians decode quickly.
• Left unaddressed, these problems reduce fuel economy, increase emissions, and can cause expensive downstream damage such as catalytic converter failure.
• Larry H. Miller Chevrolet Murray provides transparent pricing and certified repairs so you save immediately and over the life of the truck.
• To get the correct fix and preserve warranties, schedule service with our factory-trained team and review available service specials.

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

• Start with basics: tight gas cap and recent fuel quality. If the light persists, a diagnostic scan is the next step.
• At our Murray service center we perform a prompt scan and explain whether the issue is urgent or a routine fix, helping you prioritize spending for immediate and long-term savings.
• Remember, repairs covered under warranty should be completed at a certified dealership to protect coverage and ensure OEM procedures are used.
• Use online tools to schedule appointment at Larry H. Miller Chevrolet Murray today and check available service specials to save on recommended work.

2018 Chevrolet Silverado 3500HD Check Engine Light Reset

Resetting the check engine light on your 2018 Chevrolet Silverado 3500HD may seem straightforward, but an untreated diagnostic trend can lead to recurring faults and larger repairs. At Larry H. Miller Chevrolet Murray in Murray, UT, our approach is to diagnose the root cause before clearing codes. Simply erasing a code can mask an active fault, which risks catalytic converter damage, poor fuel economy, or engine misfire escalation. Our certified technicians use GM OEM scanners to read pending and permanent codes, perform functional checks, and advise on OEM parts and repair schedules tailored to heavy-duty trucks like the Silverado 3500HD. We prioritize transparency: you receive a clear estimate, parts options, and timelines. Choosing dealership service often costs less over time because accurate diagnostics prevent repeat visits and preserve resale value. Ask about service financing if you need to spread payments, and visit our service specials page to find current offers. When youre ready, schedule service online for a professional assessment and trusted reset performed the right way.

Check Engine Light Flashing

A flashing check engine light in a 2018 Chevrolet Silverado 3500HD usually signals an active misfire or severe combustion issue that can immediately damage the catalytic converter and other engine components. This is a safety-critical indicator: reduce speed, avoid heavy loads, and get the vehicle inspected right away. At Larry H. Miller Chevrolet Murray our technicians treat flashing CELs with urgency performing prioritized diagnostics and road tests to isolate ignition, fuel, or sensor faults. We use OEM parts and factory procedures, and we can often identify issues that independent shops miss. Take advantage of our loyalty programs and current service specials to reduce immediate repair cost. If repairs are recommended, repairs under warranty must be conducted at a certified dealership to preserve coverage. We also offer service financing so you dont delay necessary repairs. For urgent attention, schedule appointment online or call our Murray service center and keep your Silverado running reliably.

2018 Chevrolet Silverado 3500HD Check Engine Light Codes

Common codes for a 2018 Chevrolet Silverado 3500HD include P0300 (random/multiple misfire), P0420 (catalyst efficiency below threshold), P0171/P0174 (lean condition), P0101 (MAF sensor performance), and P0455 (large EVAP leak). Each carries implications: misfires lower performance and can destroy a catalytic converter if ignored; P0420 left unrepaired often leads to expensive catalyst replacement; EVAP leaks raise emissions and can cause failed inspections. At Larry H. Miller Chevrolet Murray in Murray, UT, we explain these risks and provide clear cost estimates for corrective actions. Our certified techs use genuine GM parts to restore vehicle performance, which reduces long-term ownership costs and helps retain resale value. We emphasize dealership advantages: factory tooling, training, and documented service records. Check our service specials for saving opportunities, and remember service financing is available to help you address issues now. To get an accurate diagnosis and preventative guidance, schedule service with our team today.