Will it hurt my GMC S15 to drive with old spark plugs?

Replace spark plugs on time or about every 30,000 miles or so. Without the spark of electricity created by spark plugs, your engine doesn’t have the combustion it needs to start — which could leave you stranded on the road. Always replace your spark plugs on time based on GMC’s recommendations.

What should I do if I see leaks under my S15?

Puddles could indicate an oil leak, coolant leak, or brake fluid leak– all of which can critically hurt your engine. Have your engine inspected as soon as you spot a pool of liquid in your usual parking spot.

Are some driving habits better for my GMC S15 engine than others?

Hard stops and starts can lead to premature wear on your engine’s components. Lighten up that lead foot and opt for steady, fluid starts and stops instead. Your engine (and your passengers!) will thank you.

Where can I get a tune-up for my GMC S15?

At your nearby Firestone Complete Auto Care! Whether you need GMC S15 service, maintenance, or repairs, our technicians can get the job done.

How often do GMC S15 fuel injectors need to be cleaned?

Factors like fuel type and driving conditions can affect how frequently you need to clean your S15 fuel injectors. Some manufacturers recommend a fuel system cleaning as part of routine maintenance, or as needed if your vehicle is showing signs of poor fuel system performance.

Who can I go to for GMC S15 tune-ups?

Visit your nearby Firestone Complete Auto Care for GMC S15 tune-ups and more. Schedule your appointment online and save big by checking out our latest offers.

Engine Tune-Up Service for Your 1986 GMC S15

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Schedule Your GMC S15 Tune-Up Service Appointment

Keep your S15 running newer, longer. Schedule an engine tune-up as soon as you notice your engine running differently. Make your appointment today.

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Tune Into Your GMC S15

Is your engine overdue for a tune-up? If you're the type of driver who waits for something to go wrong with your vehicle, it could be time for a new way of doing things, especially if you want your 1986 GMC S15’s engine to last for a long time. Routine engine tune-ups can bring power back to your S15. Tune-ups help your engine start smoothly and run efficiently, which can mean better fuel economy (a win for you) and lower emissions (a win for the environment). When you get routine engine tune-ups based on GMC's recommendations, you can rest assured you’re investing in your S15’s long-term engine performance.

Routine Engine Tune-Up Service for Your GMC S15

Your local Firestone Complete Auto Care offers a range of engine tune-up services for your 1986 GMC S15. The first is the standard Firestone Tune-Up. The standard Firestone Tune-Up includes new spark plugs (and installation!), a thorough inspection of engine components, and a lifetime parts warranty*. The second service focuses on your S15's filters, specifically replacing the air filter and fuel filter. Yet another service is a fuel system cleaning process, which involves removing varnish, dirt, and carbon deposits that have built up inside the fuel injectors, throttle body, and throttle plate in your S15. This goes a long way in boosting your fuel system’s overall performance. Keep in mind that your S15's mileage and maintenance history can uniquely impact its tune-up needs. A one-size-fits-all engine tune-up procedure doesn’t necessarily exist. Ask one of our technicians what your vehicle needs, based on your driving habits and your car’s current condition.

Where to Get a GMC S15 Tune-Up

If you’re looking for 1986 S15 engine tune-up services, head to Firestone Complete Auto Care. Follow GMC's recommended maintenance schedule or book an appointment as soon as you notice one of the following: shaking while the engine is idling, poor fuel economy, knocking noises in the engine, or a lit up check engine light on your dashboard.

*Check with a teammate at Firestone Complete Auto Care for complete terms and conditions regarding warranties.

1986 GMC S15 Engine Tune-Up Q&A

Will it hurt my GMC S15 to drive with old spark plugs? Replace spark plugs on time or about every 30,000 miles or so. Without the spark of electricity created by spark plugs, your engine doesn’t have the combustion it needs to start — which could leave you stranded on the road. Always replace your spark plugs on time based on GMC’s recommendations.
What should I do if I see leaks under my S15? Puddles could indicate an oil leak, coolant leak, or brake fluid leak– all of which can critically hurt your engine. Have your engine inspected as soon as you spot a pool of liquid in your usual parking spot.
Are some driving habits better for my GMC S15 engine than others? Hard stops and starts can lead to premature wear on your engine’s components. Lighten up that lead foot and opt for steady, fluid starts and stops instead. Your engine (and your passengers!) will thank you.
Where can I get a tune-up for my GMC S15? At your nearby Firestone Complete Auto Care! Whether you need GMC S15 service, maintenance, or repairs, our technicians can get the job done.
How often do GMC S15 fuel injectors need to be cleaned? Factors like fuel type and driving conditions can affect how frequently you need to clean your S15 fuel injectors. Some manufacturers recommend a fuel system cleaning as part of routine maintenance, or as needed if your vehicle is showing signs of poor fuel system performance.
Who can I go to for GMC S15 tune-ups? Visit your nearby Firestone Complete Auto Care for GMC S15 tune-ups and more. Schedule your appointment online and save big by checking out our latest offers.

Maintenance for Your 1986 GMC S15

We know it’s not just a car, it’s your car. We’ll help you properly maintain your GMC S15 to keep it on the road and running smoothly. Learn more about maintenance below.

Repair Service for Your 1986 GMC S15

Your GMC S15 runs best when it’s well cared for. Make sure it’s always in tip-top shape with repairs from Firestone Complete Auto Care. Learn more about 1986 GMC S15 repairs below.