When should GMC S15 spark plugs be replaced?

When it’s time to replace the spark plugs, don’t delay. These small (but vital!) parts provide the electric spark that your car needs in order to start, and old spark plugs can prevent your car from starting at all. Replace spark plugs on time or about every 30,000 miles or so.

What does a puddle underneath my GMC S15 mean?

Don't ignore puddles of fluid under your GMC S15. It could signal a coolant leak, brake fluid leak, or an oil leak. Let any one of these leaks linger and it could cause engine damage.

What do hard starts and stops do to my S15 engine?

Hard starts and stops put extra wear and tear on engine components. Smooth, gradual starts and stops, on the other hand, are a great way to help your engine run better. They can also help maximize your fuel economy.

Where can I have a GMC S15 tune-up done?

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 should I clean my GMC S15 fuel injectors?

There is no hard and fast rule on how often fuel injectors should be cleaned, and it can vary based on driving habits and fuel type. Some manufacturers may suggest including a fuel system cleaning in your regular maintenance schedule. Or you may need to clean your fuel injectors as needed if you notice signs of a fuel system problem.

Who offers GMC S15 tune-ups?

When your S15 needs a tune-up, head to your local Firestone Complete Auto Care. Check out our latest offers to save on your service and schedule an appointment online.

Engine Tune-Up Service for Your 1989 GMC S15

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Schedule an Appointment for Your GMC S15 Tune-Up

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

Schedule an Appointment

Tune Into Your GMC S15

Is it time for an engine tune-up? If you're the type of driver who waits for something to go wrong with your vehicle, it might be time to change your ways, especially if you want your 1989 GMC S15’s engine to last for a long time. Regular engine tune-ups can optimize your S15’s power on the road. They're designed to help your engine start easier and run more efficiently, so you can enjoy improved fuel economy and lower emissions. When you take your car for regular engine tune-ups as recommended by GMC, you’re taking vital steps toward keeping your S15’s engine running smoother, longer.

Engine Tune-Up for GMC S15

The Firestone Complete Auto Care location in your community offers several GMC S15 engine tune-up services. The standard Firestone Tune-Up is one service option. This includes the installation of new spark plugs and a visual inspection of your engine’s components, plus a lifetime warranty on parts*. A second service option replaces the air and fuel filter in your S15. Our third service is a thorough cleaning of the fuel system. During this type of tune-up, we use a three-step process to get rid of harmful varnish, dirt, and carbon deposit buildup in your S15’s fuel injectors, throttle body, and throttle plate. 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. If you’re not sure what services are the best fit for your car, let us help! Talk to a technician about your driving style, mileage, and service history to learn more about your vehicle's specific needs.

Where Should I Go for My GMC S15 Tune-Up?

Come to Firestone Complete Auto Care for your next 1989 S15 engine tune-up. 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, engine knocking, or an illuminated check engine light.

*Ask a Firestone Complete Auto Care teammate about full terms and conditions for warranties.

Common Engine Tune-Up Q&A For 1989 GMC S15s

When should GMC S15 spark plugs be replaced? When it’s time to replace the spark plugs, don’t delay. These small (but vital!) parts provide the electric spark that your car needs in order to start, and old spark plugs can prevent your car from starting at all. Replace spark plugs on time or about every 30,000 miles or so.
What does a puddle underneath my GMC S15 mean? Don't ignore puddles of fluid under your GMC S15. It could signal a coolant leak, brake fluid leak, or an oil leak. Let any one of these leaks linger and it could cause engine damage.
What do hard starts and stops do to my S15 engine? Hard starts and stops put extra wear and tear on engine components. Smooth, gradual starts and stops, on the other hand, are a great way to help your engine run better. They can also help maximize your fuel economy.
Where can I have a GMC S15 tune-up done? 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 should I clean my GMC S15 fuel injectors? There is no hard and fast rule on how often fuel injectors should be cleaned, and it can vary based on driving habits and fuel type. Some manufacturers may suggest including a fuel system cleaning in your regular maintenance schedule. Or you may need to clean your fuel injectors as needed if you notice signs of a fuel system problem.
Who offers GMC S15 tune-ups? When your S15 needs a tune-up, head to your local Firestone Complete Auto Care. Check out our latest offers to save on your service and schedule an appointment online.

1989 GMC S15 Maintenance

Stay ahead of any potential issues with your GMC S15 so your car can keep pace with life! Learn more about proper maintenance for your vehicle below.

Repairs on Your 1989 GMC S15

Your car takes care of you, and we’ll take care of your car. When it’s time for a repair on your GMC S15, we’re here to help. Check out more info below about 1989 GMC S15 repairs.