Why doesn’t my Sierra 2500 HD battery stay charged?

A battery that won't hold a charge is almost as good as dead. The battery may be too old. Or, you’ve been leaving the doors slightly open and the cabin light at night. Stop by for a complimentary battery check at your favorite Firestone Complete Auto Care and learn more about your battery's charge.

What happens to my old Sierra 2500 HD battery?

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

What’s the cost of DieHard batteries for GMC Sierra 2500 HDs?

You can find affordable Sierra 2500 HD 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 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.

What is the white, crusty stuff around my Sierra 2500 HD’s battery post?

The white, flaky stuff that can build up around your Sierra 2500 HD’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 Sierra 2500 HD, 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 Sierra 2500 HD battery terminal?

Regularly inspecting and cleaning your battery terminals will help keep your Sierra 2500 HD’s electrical system running smoothly. Before cleaning, reference your owner’s manual for instructions on how to disconnect the battery cables. Once the cables have been disconnected, gently clean the terminals with a mixture of water and baking soda, a wire brush, and a rag.

Where can I purchase Sierra 2500 HD batteries near me?

Your local Firestone Complete Auto Care sells and installs Sierra 2500 HD 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 2021 GMC Sierra 2500 HD

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Get a Battery for Your GMC Sierra 2500 HD

Don’t let a dead battery stop you. Shop replacement car batteries for your 2021 GMC Sierra 2500 HD at Firestone Complete Auto Care.

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The Right Battery Size for a 2021 GMC Sierra 2500 HD

Need more info about GMC Sierra 2500 HD batteries? Use this chart to find the right battery size and CCAs for your GMC Sierra 2500 HD.

Battery	Engine	Warranty		Cold Cranking Amps
94RH7	V8/6.6L	Replacement 36 months	Performance months	800
H7-AGM	V8/6.6L	Replacement 36 months	Performance months	850

BATTERIES
V8/6.6L - Battery: 94RH7 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 800
V8/6.6L - Battery: H7-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 850

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Buying a Replacement Battery for GMC Sierra 2500 HD

You can pretty much drive your GMC Sierra 2500 HD until you don't want to anymore. But your Sierra 2500 HD's battery? Don't count on it to last forever. Generally, car batteries last from three to five years. You want to replace your 2021 GMC Sierra 2500 HD battery before it fails and leaves you stranded. Watch for signs that your current battery is getting too old or too weak. A sluggish engine start, an illuminated check engine light or battery signal, bloated battery case, corroded battery terminals, or dim headlights may all indicate that your battery is on its last leg.

Or, you can get a complimentary battery check at your nearest Firestone Complete Auto Care. With best-in-class tools we can tell you how much "life" is left in your battery. Stop by for a free battery test and, if needed, a replacement battery for your 2021 GMC Sierra 2500 HD. Car batteries are one of our many specialties! Our technicians are well-acquainted with GMC’s service specs for Sierra 2500 HD battery CCAs and reserve capacity. Get help choosing the battery size that's best for your Sierra 2500 HD, and schedule a weekday or weekend battery replacement service for your car.

Why Choose a DieHard Battery for Your Sierra 2500 HD?

We know what’s best for your GMC Sierra 2500 HD, which is why we exclusively carry the best. Your vehicle needs a reliable, durable and powerful battery in even the most extreme conditions. DieHard Sierra 2500 HD batteries surpass expectations using state-of-the-art advancements to meet the increasing power demands of new vehicles. Don't call a DieHard battery ordinary. It's an extraordinary battery. Go with a DieHard battery for your Sierra 2500 HD and have the peace of mind that performance will be there when you need it most. That’s why you should choose batteries from Firestone Complete Auto Care.

Caring for a New GMC Sierra 2500 HD Battery

Got a new car battery installed in your 2021 GMC Sierra 2500 HD? Congrats! You can give your new battery a head start with proper care and attention. turning off all of the lights when you leave your vehicle, limiting short trips, 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 Sierra 2500 HD Car Battery Questions

Turn to Firestone Complete Auto Care for answers to all your car battery questions. If you have battery questions that are GMC Sierra 2500 HD-specific, pay us a visit. Our expert techs have the answers you need.

Why doesn’t my Sierra 2500 HD battery stay charged? A battery that won't hold a charge is almost as good as dead. The battery may be too old. Or, you’ve been leaving the doors slightly open and the cabin light at night. Stop by for a complimentary battery check at your favorite Firestone Complete Auto Care and learn more about your battery's charge.
What happens to my old Sierra 2500 HD battery? We recycle it, taking care of both your car and the Earth.
What’s the cost of DieHard batteries for GMC Sierra 2500 HDs? You can find affordable Sierra 2500 HD 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 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.
What is the white, crusty stuff around my Sierra 2500 HD’s battery post? The white, flaky stuff that can build up around your Sierra 2500 HD’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 Sierra 2500 HD, 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 Sierra 2500 HD battery terminal? Regularly inspecting and cleaning your battery terminals will help keep your Sierra 2500 HD’s electrical system running smoothly. Before cleaning, reference your owner’s manual for instructions on how to disconnect the battery cables. Once the cables have been disconnected, gently clean the terminals with a mixture of water and baking soda, a wire brush, and a rag.
Where can I purchase Sierra 2500 HD batteries near me? Your local Firestone Complete Auto Care sells and installs Sierra 2500 HD batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.