1988 GMC S15 Engine Tune-Ups & Maintenance

Schedule GMC S15 Tune-Up

If your S15 is acting strange or making new noises, it could be engine tune-up time. Don’t wait until small problems get bigger. Make an appointment now.

Tune Into Your GMC S15

Is your engine overdue for a tune-up? If you usually wait until your car has an issue to take it in for service, now is the time to work on that habit, particularly if you want to keep your 1988 GMC S15 in tip-top shape. 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 take your car for regular engine tune-ups as recommended by GMC, you can rest assured you’re investing in your S15’s long-term engine performance.

Engine Tune-Up for GMC S15

The Firestone Complete Auto Care location in your community offers several GMC S15 engine tune-up services. The first is the standard Firestone Tune-Up. It includes a complete visual inspection of engine components, installation of new spark plugs, and a lifetime warranty on parts*. Another service option pays special attention to the filters in your S15. Specifically, we replace the fuel filter and air filter. 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. Consider this when choosing a tune-up service for your S15: your vehicle’s maintenance record and mileage can determine which service is best. A one-size-fits-all engine tune-up procedure doesn’t necessarily exist. Chat with a Firestone technician before you jump into a specific service to ensure your engine tune-up money is well-spent.

Where to Get a GMC S15 Tune-Up

If you’re looking for 1988 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, engine knocking, or an illuminated check engine light.

*Talk to a Firestone Complete Auto Care teammate for full terms and conditions on warranties.

1988 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. Spark plugs are small but mighty. The spark of electricity that the plug emits across a small gap creates the ignition for the combustion needed to start your car. Without that spark, your car won't start.
  • What should I do if I see leaks under my S15? 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.
  • Are hard starts and stops bad for my GMC S15 engine? 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.

Maintenance for Your 1988 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.

Repairs on Your 1988 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 1988 GMC S15 repairs below.