Why won't my S15 battery stay charged?

A battery is in its final hour when it will no longer hold a charge. The battery might be old. Or, you may have a habit of leaving your car doors open and the dome lights on during the night. Stop in for a free battery check at your local Firestone Complete Auto Care and learn more about your battery's charge.

What do you do with my old S15 battery?

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

How much will replacing my GMC S15’s battery cost if I get a DieHard battery?

You can find affordable S15 batteries by using one of our car battery coupons, when available. Plus, every DieHard battery comes with extra coverage thanks to DieHard Assurance and a free replacement warranty.

How long is a car battery good for?

Car battery lifespan varies depending on a few factors, including driving conditions, accessories, how well it’s maintained, and the type of battery. On average, a car battery lasts about three to five years.

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

If you notice white, crusty stuff around the battery terminals of your S15, it's likely corrosion. A chemical reaction between battery acid and the air can create a white, powdery substance that builds up over time on the terminals. This buildup can interfere with the electrical connection between the battery and your S15’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.

How do I clean corrosion off my S15 vehicle battery?

Regularly inspect the terminals and clean them with a mixture of baking soda and water, a wire brush, and a rag. Disconnect the battery cables before cleaning to help avoid the risk of electrical shock. Always reference and follow the instructions in your vehicle owner’s manual prior to disconnecting the battery cables.

Where can I purchase 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.

1990 GMC S15 Batteries

Get a New GMC Battery

GMC S15 Batteries Near You

Don’t let a dead battery stop you. Shop replacement car batteries for your 1990 GMC S15 at Firestone Complete Auto Care.

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Battery Size & Replacement for 1990 GMC S15

Researching battery replacements for your GMC S15? Use the following chart to find information on GMC S15 battery size and cold cranking amps.

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

Your S15 doesn't have an expiration date, but its battery does. Generally, car batteries last from three to five years. Check your battery regularly and replace it as needed so it doesn’t leave you and your GMC S15 stranded. Pay attention to clues that your battery is on its way out. A slow engine crank, a blinking battery or check engine light, swollen battery case, corrosion-covered posts, and subpar electrical performance can all signal 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. Drop in for a free battery check and, if necessary, a battery replacement to help keep your 1990 GMC S15 running! Car batteries are only one of our many strong suits. Our technicians are well-acquainted with GMC’s service specs for S15 battery cold cranking amps and reserve capacity. Get help identifying the type and size of battery that matches your vehicle, and schedule a fast car battery replacement at your earliest convenience.

Is There a DieHard Battery for S15s?

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 using state-of-the-art advancements to fuel the growing power requirements of new vehicles. A DieHard battery isn't an ordinary car battery. It's extraordinary. Buy a DieHard battery for your GMC S15 and drive with confidence knowing that performance will be there when you need it most. That's the kind of battery we deliver.

Caring for a New GMC S15 Battery

Got a new car battery installed in your 1990 GMC S15? Congrats! Give your new car battery the best start with proper care. Help extend your car battery’s life by cutting back on unnecessary short trips, keeping your battery posts clean, and avoiding radio and electronic component use when the engine is off.

Answers to Your S15 Car Battery Questions

Turn to Firestone Complete Auto Care for answers to all your car battery questions. If you have a battery question that's unique to your GMC S15 battery, pay us a visit. Our expert techs have the answers you need.

Why won't my S15 battery stay charged? A battery is in its final hour when it will no longer hold a charge. The battery might be old. Or, you may have a habit of leaving your car doors open and the dome lights on during the night. Stop in for a free battery check at your local Firestone Complete Auto Care and learn more about your battery's charge.
What do you do with my old S15 battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
How much will replacing my GMC S15’s battery cost if I get a DieHard battery? You can find affordable S15 batteries by using one of our car battery coupons, when available. Plus, every DieHard battery comes with extra coverage thanks to DieHard Assurance and a free replacement warranty.
How long is a car battery good for? Car battery lifespan varies depending on a few factors, including driving conditions, accessories, how well it’s maintained, and the type of battery. On average, a car battery lasts about three to five years.
What is the white, crusty stuff around my S15’s battery post? If you notice white, crusty stuff around the battery terminals of your S15, it's likely corrosion. A chemical reaction between battery acid and the air can create a white, powdery substance that builds up over time on the terminals. This buildup can interfere with the electrical connection between the battery and your S15’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.
How do I clean corrosion off my S15 vehicle battery? Regularly inspect the terminals and clean them with a mixture of baking soda and water, a wire brush, and a rag. Disconnect the battery cables before cleaning to help avoid the risk of electrical shock. Always reference and follow the instructions in your vehicle owner’s manual prior to disconnecting the battery cables.
Where can I purchase 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.