Why doesn’t my K3500 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’ve been leaving the doors slightly open and the dome lights on during the night. Stop in for a free battery check at your favorite Firestone Complete Auto Care to learn more about the state of your battery.

What do you do with my old K3500 battery?

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

What’s the cost of DieHard batteries for GMC K3500s?

You can find affordable K3500 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 often should I replace my car battery?

You can usually get three to five years out of your car battery. However, battery type, how well you maintain your battery, and your driving habits can all affect your battery’s lifespan.

Why is there white, flaky stuff around my K3500’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 K3500 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 K3500 car battery?

You can help prevent or get rid of corrosion by regularly inspecting and cleaning your battery terminals. Before cleaning your battery, see your K3500 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.

Who sells K3500 batteries near me?

Your local Firestone Complete Auto Care sells and installs K3500 batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.

1985 GMC K3500 Batteries

Get a New GMC Battery

Get a Battery for Your GMC K3500

Don’t let a dead battery stop you. Shop replacement car batteries for your 1985 GMC K3500 at Firestone Complete Auto Care.

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1985 GMC K3500 Battery Replacement & Size

Researching battery replacements for your GMC K3500? Check the chart to find the right car battery size and cold cranking amps for your K3500.

Battery	Engine	Warranty		Cold Cranking Amps
78-1	L6/4.8L	Replacement 24 months	Performance months	700
75FT-3	L6/4.8L	Replacement 36 months	Performance months	700
78-AGM	L6/4.8L	Replacement 36 months	Performance months	740
75-2	V8/5.7L	Replacement 24 months	Performance months	650
78FT-2	V8/5.7L	Replacement 36 months	Performance months	800
78-AGM	V8/5.7L	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	V8/7.4L	Replacement 24 months	Performance months	700
78FT-2	V8/7.4L	Replacement 36 months	Performance months	800
78-AGM	V8/7.4L	Replacement 36 months	Performance months	740

BATTERIES
L6/4.8L - Battery: 78-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 700
L6/4.8L - Battery: 75FT-3 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 700
L6/4.8L - Battery: 78-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740
V8/5.7L - Battery: 75-2 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 650
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: 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
V8/7.4L - Battery: 78-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 700
V8/7.4L - Battery: 78FT-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 800
V8/7.4L - Battery: 78-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 740

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Buy the Right Battery for Your GMC K3500

You can pretty much drive your GMC K3500 until you don't want to anymore. But your K3500's battery? Don't count on it to last forever. Generally, car batteries last from three to five years. You want to replace your 1985 GMC K3500 battery before it fails and leaves you stranded. Look out for symptoms of a faulty car battery. A slow engine crank, an illuminated battery or check engine light, bloated battery case, corroded battery posts, or weak lights can all signal that your battery is on its last leg.

You can also get a Free Battery Test at your local Firestone Complete Auto Care. Our equipment can see how much charge is left in your battery. Drop in for a free battery check and, if needed, a replacement battery for your 1985 GMC K3500. Car batteries are one of our many specialties! Our expert technicians understand GMC service recommendations for K3500 car batteries’ reserve capacities and cold cranking amps. Get help figuring out 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 K3500?

We only want what’s best for your GMC K3500, which is why we only carry top-of-the-line replacement parts and batteries. Your vehicle needs a reliable, durable and powerful battery in even the most extreme conditions. DieHard batteries shatter expectations using state-of-the-art advancements to meet the expanding power demands of modern vehicles A DieHard battery isn't an ordinary car battery. It's extraordinary. Choose a DieHard battery for your GMC K3500 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 GMC K3500 Battery

Got a new car battery installed in your 1985 GMC K3500? Great job! Give your new car battery the best start with proper care. Give your new battery a hand by decreasing the number of short trips you take, cleaning your battery posts, and avoiding radio and electronic component use when the engine is off.

Answers to Your K3500 Car Battery Questions

Get answers to common car battery questions, from Firestone Complete Auto Care. If you have a battery question that's unique to your GMC K3500 battery, pay us a visit. Our technicians have the answers.

Why doesn’t my K3500 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’ve been leaving the doors slightly open and the dome lights on during the night. Stop in for a free battery check at your favorite Firestone Complete Auto Care to learn more about the state of your battery.
What do you do with my old K3500 battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
What’s the cost of DieHard batteries for GMC K3500s? You can find affordable K3500 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 often should I replace my car battery? You can usually get three to five years out of your car battery. However, battery type, how well you maintain your battery, and your driving habits can all affect your battery’s lifespan.
Why is there white, flaky stuff around my K3500’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 K3500 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 K3500 car battery? You can help prevent or get rid of corrosion by regularly inspecting and cleaning your battery terminals. Before cleaning your battery, see your K3500 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.
Who sells K3500 batteries near me? Your local Firestone Complete Auto Care sells and installs K3500 batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.