Why won't my S15 battery stay charged?

A car battery that needs to be jump-started every time is as good as dead. The battery might be old. Or, you may have a habit of leaving your car doors open and the cabin light at night. Stop by for a complimentary battery check at your nearest Firestone Complete Auto Care and get a handle on your car battery’s health.

What do you do with my dead 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?

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 long do car batteries last?

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.

Why is there white, crusty buildup on 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 a corroded S15 battery terminal?

To help extend the life of your battery, you should routinely inspect and clean the terminals using a baking soda and water mix, wire brush, and rag. Be sure to disconnect the battery cables before cleaning and check your S15 owner’s manual for instructions on how to do so.

Who sells 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.

Car Batteries for 1984 GMC S15

Get a New GMC Battery

Get a Battery for Your GMC S15

The middle of nowhere is the wrong place to have a weak battery. Shop replacement batteries for 1984 GMC S15 today and schedule a quick installation at Firestone Complete Auto Care.

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The Right Battery Size for a 1984 GMC S15

Researching battery replacements for your GMC S15? Use this chart to find the right battery size and CCAs for your GMC S15.

Battery	Engine	Warranty		Cold Cranking Amps
78-1	L4/1.9L	Replacement 24 months	Performance months	700
75FT-3	L4/1.9L	Replacement 36 months	Performance months	700
78-AGM	L4/1.9L	Replacement 36 months	Performance months	740
34/78-4	L4/2.2L	Replacement 24 months	Performance months	800
78FT-2	L4/2.2L	Replacement 36 months	Performance months	800
75-2	L4/2.0L	Replacement 24 months	Performance months	650
78FT-2	L4/2.0L	Replacement 36 months	Performance months	800
78-AGM	L4/2.0L	Replacement 36 months	Performance months	740
78-1	V6/2.8L	Replacement 24 months	Performance months	700
78FT-2	V6/2.8L	Replacement 36 months	Performance months	800
78-AGM	V6/2.8L	Replacement 36 months	Performance months	740

BATTERIES
L4/1.9L - Battery: 78-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 700
L4/1.9L - Battery: 75FT-3 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 700
L4/1.9L - Battery: 78-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740
L4/2.2L - Battery: 34/78-4 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 800
L4/2.2L - Battery: 78FT-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 800
L4/2.0L - Battery: 75-2 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 650
L4/2.0L - Battery: 78FT-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 800
L4/2.0L - 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: 78FT-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 800
V6/2.8L - Battery: 78-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740

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Buying a Replacement Battery for GMC S15

Your S15 doesn't have an expiration date, but its battery does. On average, auto batteries last anywhere from three to five years. Don’t get stranded by your S15’s car battery. Replace it regularly instead! Watch for signs that your current battery is getting too old or too weak. A slow engine crank, a blinking battery or check engine light, bloated battery case, corroded battery terminals, or weak lights may all indicate that your battery is waving goodbye.

You can also get a Free Battery Test at your local Firestone Complete Auto Care. 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, a replacement battery for your 1984 GMC S15. Car batteries are one of our many specialties! Our technicians are well-acquainted with GMC’s service specs for S15 battery CCAs and reserve capacity. Get help choosing the battery size that fits your car perfectly, and schedule a weekday or weekend battery replacement service for your car.

Why Choose a DieHard Battery for Your S15?

We know what’s best for your GMC S15, which is why we exclusively carry the best. Your S15 needs a reliable, durable and powerful battery in extremely hot and cold environments. DieHard batteries shatter expectations and house the latest technology to satisfy the expanding power demands of new vehicles. A DieHard battery isn't an ordinary car battery. It's extraordinary. Go with a DieHard battery for your S15 and have the peace of mind that your battery will perform when you need it. That’s why you should choose batteries from Firestone Complete Auto Care.

Caring for a New GMC S15 Battery

Have you recently had a fresh battery installed in your GMC S15? Great job! Now, help it last longer and stay charged by caring for it from the get-go. turning off all of the lights when you leave your vehicle, decreasing the number of short trips you take, keeping the battery posts corrosion-free, and not using electronics such as the radio and power outlets 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 S15-specific battery question, pay us a visit. Our technicians have the answers.

Why won't my S15 battery stay charged? A car battery that needs to be jump-started every time is as good as dead. The battery might be old. Or, you may have a habit of leaving your car doors open and the cabin light at night. Stop by for a complimentary battery check at your nearest Firestone Complete Auto Care and get a handle on your car battery’s health.
What do you do with my dead 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? 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 long do car batteries last? 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.
Why is there white, crusty buildup on 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 a corroded S15 battery terminal? To help extend the life of your battery, you should routinely inspect and clean the terminals using a baking soda and water mix, wire brush, and rag. Be sure to disconnect the battery cables before cleaning and check your S15 owner’s manual for instructions on how to do so.
Who sells 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.