Why won't my S15 battery stay charged?

A car battery that needs to be jump-started every time is as good as dead. It may be getting old. Or, you may have been leaving your car doors ajar and the dome lights on during the night. Stop by for a free battery test at your favorite Firestone Complete Auto Care to learn more about the state of your battery.

What do you do with my old S15 battery?

We recycle it! Nearly 100% of all lead-acid batteries are recyclable.

How much do DieHard batteries cost for your GMC S15?

GMC S15 batteries can be affordable, especially when there's an available battery coupon. The best part is every DieHard battery comes with a free replacement warranty and extra coverage with DieHard Assurance.

How often should I replace my car battery?

A car battery normally lasts three to five years, but this number can vary based on battery type, your driving habits, and battery maintenance.

What is the white, crusty stuff around my S15’s battery post?

The white, flaky stuff that can build up around your S15’s battery terminals is known as corrosion. Acid leaking from your vehicle’s battery post can have a chemical reaction with the air, leading to an accumulation of the white, powdery substance over time. Corrosion can affect the flow of electricity between your battery and the electrical system in your S15, possibly causing issues with electrical performance and starting. If left unaddressed for long enough, it may even cause your battery to prematurely fail.

How do I clean corrosion off my S15 vehicle battery?

Regularly inspecting and cleaning your battery terminals will help keep your S15’s electrical system running smoothly. Before cleaning, reference your owner’s manual for instructions on how to disconnect the battery cables. Once the cables have been disconnected, gently clean the terminals with a mixture of water and baking soda, a wire brush, and a rag.

Who carries S15 batteries near me?

Your local Firestone Complete Auto Care sells and installs S15 batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.

1989 GMC S15 Car Batteries

Get a New GMC Battery

Get a Battery for Your GMC S15

Don't let a failing battery slow you down. Shop replacement batteries for 1989 GMC S15s today and schedule a quick installation at Firestone Complete Auto Care.

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1989 GMC S15 Battery Replacement & Size

Need more info about GMC S15 batteries? Use this chart to find the right battery size and CCAs for your GMC S15.

Battery	Engine	Warranty		Cold Cranking Amps
78-1	V6/4.3L	Replacement 24 months	Performance months	700
78FT-2	V6/4.3L	Replacement 36 months	Performance months	800
78-AGM	V6/4.3L	Replacement 36 months	Performance months	740
34/78-4	L4/2.5L	Replacement 24 months	Performance months	800
75FT-3	L4/2.5L	Replacement 36 months	Performance months	700
78-AGM	L4/2.5L	Replacement 36 months	Performance months	740
78-1	V6/2.8L	Replacement 24 months	Performance months	700
75FT-3	V6/2.8L	Replacement 36 months	Performance months	700
78-AGM	V6/2.8L	Replacement 36 months	Performance months	740

BATTERIES
V6/4.3L - Battery: 78-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 700
V6/4.3L - Battery: 78FT-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 800
V6/4.3L - Battery: 78-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740
L4/2.5L - Battery: 34/78-4 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 800
L4/2.5L - Battery: 75FT-3 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 700
L4/2.5L - Battery: 78-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740
V6/2.8L - Battery: 78-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 700
V6/2.8L - Battery: 75FT-3 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 700
V6/2.8L - Battery: 78-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740

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Shopping for GMC S15 Car Batteries

Sadly, your GMC S15 won't last forever. Neither will its battery. On average, auto batteries last anywhere from three to five years. You want to replace your 1989 GMC S15 battery before it fails and leaves you stranded. Pay attention to clues that your battery is on its way out. A slow engine crank, a blinking battery or check engine light, bloated battery case, corrosion-covered posts, and subpar electrical performance may all indicate that your battery is waving goodbye.

Plus, at Firestone Complete Auto Care, we’ll test your battery for free. With best-in-class tools we can tell you how much "life" is left in your battery. Visit us for a complimentary battery check and, if needed, get your GMC S15 a replacement battery. Car batteries are one of our many specialties! Our technicians are familiar with GMC-specific recommendations for S15 car batteries’ reserve capacities and cold cranking amps. Get help choosing the battery size that's best for your S15, and schedule a weekday or weekend battery replacement service for your car.

Find the Right DieHard Battery for Your S15

We only want what’s best for your GMC S15, which is why we exclusively carry the best. You need a reliable, durable and powerful battery in extremely hot and cold environments. DieHard S15 batteries surpass expectations and house the latest technology to meet the expanding power requirements of new vehicles. Don't call a DieHard battery ordinary. It's an extraordinary battery. Go with a DieHard battery for your S15 and get behind the wheel with confidence. Why? Because performance will be there when you need it most. That’s why you should choose batteries from Firestone Complete Auto Care.

Caring for a New GMC S15 Battery

Got a new car battery installed in your 1989 GMC S15? Good thinking! You can give your new battery a head start with proper care and attention. flipping the dome lights and headlights off when exiting the car, limiting short trips, keeping the battery posts corrosion-free, and not using electronics such as the radio and power outlets when the engine is off.