Why doesn’t my K20 Suburban battery stay charged?

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

What do you do with my dead K20 Suburban battery?

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

How much will replacing my Chevrolet K20 Suburban’s battery cost if I get a DieHard battery?

Chevrolet K20 Suburban 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, flaky stuff around my K20 Suburban’s battery post?

If you notice white, crusty stuff around the battery terminals of your K20 Suburban, 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 K20 Suburban’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.

How do I clean a corroded K20 Suburban battery terminal?

You can help prevent or get rid of corrosion by regularly inspecting and cleaning your battery terminals. Before cleaning your battery, see your K20 Suburban owner's manual to learn how to disconnect the battery cables. After disconnecting the cables, use a mixture of water and baking soda, a wire brush, and a rag to carefully clean the terminals.

Where can I find a battery for my K20 Suburban?

You can shop for K20 Suburban batteries at your local Firestone Complete Auto Care, and our expert technicians will even handle the installation. Don’t have time to visit our store? Our Firestone Direct mobile vans can come to you for battery installations! Learn more about our mobile battery services.

1986 Chevrolet K20 Suburban Batteries

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Get a New Chevrolet K20 Suburban Battery

The middle of nowhere is the wrong place to have a weak battery. Shop replacement batteries for 1986 Chevrolet K20 Suburban today and schedule a quick installation at Firestone Complete Auto Care.

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Battery Size & Replacement for 1986 Chevrolet K20 Suburban

Researching battery replacements for your Chevrolet K20 Suburban? Check the chart to find the right car battery size and cold cranking amps for your K20 Suburban.

Battery	Engine	Warranty		Cold Cranking Amps
75-2	V8/5.0L	Replacement 24 months	Performance months	650
78FT-2	V8/5.0L	Replacement 36 months	Performance months	800
78-AGM	V8/5.0L	Replacement 36 months	Performance months	740
34/78-4	V8/5.7L	Replacement 24 months	Performance months	800
78FT-2	V8/5.7L	Replacement 36 months	Performance months	800
78-AGM	V8/5.7L	Replacement 36 months	Performance months	740
75-2	V8/6.2L	Replacement 24 months	Performance months	650
75FT-3	V8/6.2L	Replacement 36 months	Performance months	700
78-AGM	V8/6.2L	Replacement 36 months	Performance months	740

BATTERIES
V8/5.0L - Battery: 75-2 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 650
V8/5.0L - Battery: 78FT-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 800
V8/5.0L - Battery: 78-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740
V8/5.7L - Battery: 34/78-4 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 800
V8/5.7L - Battery: 78FT-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 800
V8/5.7L - Battery: 78-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740
V8/6.2L - Battery: 75-2 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 650
V8/6.2L - Battery: 75FT-3 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 700
V8/6.2L - Battery: 78-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740

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Buy the Right Battery for Your Chevrolet K20 Suburban

Your K20 Suburban 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 K20 Suburban’s car battery. Replace it regularly instead! Pay attention to clues that your battery is on its way out. A lagging starter, an illuminated check engine light or battery signal, bloated battery case, corrosion-covered posts, or weak lights can all be signs that your battery is waving goodbye.

Plus, at Firestone Complete Auto Care, we’ll test your battery for free. Our equipment can see how much charge is left in your battery. Drop in for a free battery check and, if necessary, a battery replacement to help keep your 1986 Chevrolet K20 Suburban running! Car batteries are one of our many specialties! Our technicians are familiar with Chevrolet-specific recommendations for K20 Suburban battery cold cranking amps and reserve capacity. Get help figuring out the battery size that's best for your K20 Suburban, and schedule an appointment today for a quick car battery replacement.

Find the Right DieHard Battery for Your K20 Suburban

We know what’s best for your Chevrolet K20 Suburban, which is why we only carry top-of-the-line replacement parts and batteries. Your K20 Suburban needs a reliable, durable and powerful battery in extremely hot and cold environments. DieHard K20 Suburban batteries surpass expectations using the latest innovative technology to meet the growing power demands of new vehicles. They're no ordinary battery, they're extraordinary. Go with a DieHard battery for your K20 Suburban and have the peace of mind that performance will be there when you're counting on it. That's the kind of battery we deliver.

Caring for a New Chevrolet K20 Suburban Battery

Did you recently have a new 1986 Chevrolet K20 Suburban car battery installed? Congrats! Now, help it last longer and stay charged by caring for it from the get-go. Help extend your car battery’s life by decreasing the number of short trips you take, keeping your battery posts clean, and not using electronics such as the radio and power outlets when the engine is off.

Answers to Your K20 Suburban 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 Chevrolet K20 Suburban battery, stop by your nearest store. Our technicians are happy to help.

Why doesn’t my K20 Suburban battery stay charged? A car battery that needs to be jump-started every time is as good as dead. The battery may be too old. Or, you may have been leaving your car doors ajar and the dome lights on during the night. Stop by for a complimentary battery check at your favorite Firestone Complete Auto Care to learn more about the state of your battery.
What do you do with my dead K20 Suburban battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
How much will replacing my Chevrolet K20 Suburban’s battery cost if I get a DieHard battery? Chevrolet K20 Suburban 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, flaky stuff around my K20 Suburban’s battery post? If you notice white, crusty stuff around the battery terminals of your K20 Suburban, 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 K20 Suburban’s electrical system, potentially leading to poor performance, difficulty starting, and other issues.
How do I clean a corroded K20 Suburban battery terminal? You can help prevent or get rid of corrosion by regularly inspecting and cleaning your battery terminals. Before cleaning your battery, see your K20 Suburban owner's manual to learn how to disconnect the battery cables. After disconnecting the cables, use a mixture of water and baking soda, a wire brush, and a rag to carefully clean the terminals.
Where can I find a battery for my K20 Suburban? You can shop for K20 Suburban batteries at your local Firestone Complete Auto Care, and our expert technicians will even handle the installation. Don’t have time to visit our store? Our Firestone Direct mobile vans can come to you for battery installations! Learn more about our mobile battery services.