Why won't my K20 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’ve been leaving the doors slightly open and the lights on overnight. Stop by for a free battery test at your nearest Firestone Complete Auto Care to learn more about the state of your battery.

What do you do with my old K20 battery?

We recycle it, taking care of both your car and the Earth.

What’s the cost of DieHard batteries for Chevrolet K20s?

Chevrolet K20 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?

The typical 12-volt car battery may last three to five years, depending on the type of battery, the driving conditions, and how well the battery is maintained.

Why is there white, crusty buildup on my K20’s battery post?

A chemical reaction between battery acid and the air can cause a white, crusty buildup to form on the terminals of your K20 car battery. This buildup — known as corrosion — can impede the flow of electricity and cause a range of issues, from poor performance to premature battery failure.

What do I do about corrosion on my K20 car battery?

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 K20 owner’s manual for instructions on how to do so.

Where can I find a battery for my K20?

At Firestone Complete Auto Care, we make it easy to get a new car battery. Our stores sell and install K20 batteries, and our Firestone Direct mobile vans can even come to you for added convenience. Check out our mobile battery services to learn more.

1985 Chevrolet K20 Batteries

Get a New Chevrolet Battery

Get a Battery for Your Chevrolet K20

Don't let a failing battery slow you down. Shop replacement batteries for 1985 Chevrolet K20s today and schedule a quick installation at Firestone Complete Auto Care.

Shop Batteries

The Right Battery Size for a 1985 Chevrolet K20

Not sure what battery to get for your Chevrolet K20? Use the following chart to find information on Chevrolet K20 battery size and cold cranking amps.

Battery	Engine	Warranty		Cold Cranking Amps
75-2	L6/4.8L	Replacement 24 months	Performance months	650
75FT-3	L6/4.8L	Replacement 36 months	Performance months	700
78-1	V8/5.0L	Replacement 24 months	Performance months	700
75FT-3	V8/5.0L	Replacement 36 months	Performance months	700
78-AGM	V8/5.0L	Replacement 36 months	Performance months	740
75-2	V6/4.3L	Replacement 24 months	Performance months	650
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	V8/6.2L	Replacement 24 months	Performance months	800
78FT-2	V8/6.2L	Replacement 36 months	Performance months	800
78-AGM	V8/6.2L	Replacement 36 months	Performance months	740
78-1	V8/5.7L	Replacement 24 months	Performance months	700
75FT-3	V8/5.7L	Replacement 36 months	Performance months	700
78-AGM	V8/5.7L	Replacement 36 months	Performance months	740

BATTERIES
L6/4.8L - Battery: 75-2 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 650
L6/4.8L - Battery: 75FT-3 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 700
V8/5.0L - Battery: 78-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 700
V8/5.0L - Battery: 75FT-3 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 700
V8/5.0L - Battery: 78-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740
V6/4.3L - Battery: 75-2 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 650
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
V8/6.2L - Battery: 34/78-4 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 800
V8/6.2L - Battery: 78FT-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 800
V8/6.2L - Battery: 78-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740
V8/5.7L - Battery: 78-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 700
V8/5.7L - Battery: 75FT-3 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 700
V8/5.7L - Battery: 78-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740

Schedule an Appointment

Buy the Right Battery for Your Chevrolet K20

You can pretty much drive your Chevrolet K20 until you don't want to anymore. But your K20's battery? Don't count on it to last forever. Generally, car batteries last from three to five years. Don’t get stranded by your K20’s car battery. Replace it regularly instead! Pay attention to clues that your battery is on its way out. A sluggish engine start, an illuminated battery or check engine light, bloated battery case, corrosion-covered posts, and subpar electrical performance may all indicate that your battery needs attention.

Or, you can get a complimentary battery check at your nearest Firestone Complete Auto Care. Our equipment can see how much charge is left in your battery. Visit us for a complimentary battery check and, if needed, a replacement battery for your 1985 Chevrolet K20. Automotive batteries are just one of our many areas of expertise. Our expert technicians understand Chevrolet service recommendations for K20 car batteries’ reserve capacities and cold cranking amps. Get help figuring out the battery size that fits your car perfectly, and schedule a fast car battery replacement at your earliest convenience.

Firestone Has DieHard Batteries for K20s

We only want what’s best for your Chevrolet K20, which is why we exclusively carry the best. Your K20 needs a reliable, durable and powerful battery in extremely hot and cold environments. DieHard batteries go above and beyond using the latest innovative technology to satisfy the increasing power needs of modern vehicles They're no ordinary battery, they're extraordinary. Buy a DieHard battery for your Chevrolet K20 and get behind the wheel with confidence. Why? Because your battery will perform when you need it. That's the kind of battery we deliver.

Making Your K20’s New Battery Last

Got a new car battery installed in your 1985 Chevrolet K20? Great job! Now, help it last longer and stay charged by caring for it from the get-go. ensuring all the lights are turned off before you leave the car, cutting back on unnecessary short trips, keeping your battery posts clean, and not playing the radio or using other electronics when the engine is turned off.

Answers to Your K20 Car Battery Questions

Turn to Firestone Complete Auto Care for answers to all your car battery questions. If you have battery questions that are Chevrolet K20-specific, visit your nearest store. Our technicians have the answers.

Why won't my K20 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’ve been leaving the doors slightly open and the lights on overnight. Stop by for a free battery test at your nearest Firestone Complete Auto Care to learn more about the state of your battery.
What do you do with my old K20 battery? We recycle it, taking care of both your car and the Earth.
What’s the cost of DieHard batteries for Chevrolet K20s? Chevrolet K20 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? The typical 12-volt car battery may last three to five years, depending on the type of battery, the driving conditions, and how well the battery is maintained.
Why is there white, crusty buildup on my K20’s battery post? A chemical reaction between battery acid and the air can cause a white, crusty buildup to form on the terminals of your K20 car battery. This buildup — known as corrosion — can impede the flow of electricity and cause a range of issues, from poor performance to premature battery failure.
What do I do about corrosion on my K20 car battery? 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 K20 owner’s manual for instructions on how to do so.
Where can I find a battery for my K20? At Firestone Complete Auto Care, we make it easy to get a new car battery. Our stores sell and install K20 batteries, and our Firestone Direct mobile vans can even come to you for added convenience. Check out our mobile battery services to learn more.