Why does the check engine light come on when I start my Sierra 3500 HD?

It's okay if your check engine light comes on when you first start your vehicle. This is a sign that your vehicle is testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

Why does my GMC engine sound different?

Strange under-the-hood noises can point to problems within your GMC Sierra 3500 HD engine. Knocking or tapping could be a symptom of low oil. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing may be caused by a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage my GMC Sierra 3500 HD engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car is in Park, or accelerating too quickly, too soon. Steer clear of these habits to help protect engine performance and efficiency.

Can I add water to my GMC Sierra 3500 HD radiator?

It’s not recommended you put water in your Sierra 3500 HD radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.

What can cause the engine in my Sierra 3500 HD to suddenly stop?

There are different reasons your Sierra 3500 HD vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.

Who can repair my GMC Sierra 3500 HD engine?

Your local Firestone Complete Auto Care offers GMC Sierra 3500 HD engine repair. Schedule an appointment today at one of our thousands of locations nationwide!

Reliable Repairs for 2015 GMC Sierra 3500 HD Engines

Learn about

2015 GMC Sierra 3500 HD Trim Options

Select your GMC Sierra 3500 HD trim level to learn more about GMC-recommended engine repair. Even GMC Sierra 3500 HD parts will get older and change.

V8/6.0L

V8/6.6L

2015 GMC Sierra 3500 HD Repair

Nothing stays the same forever. Even your GMC Sierra 3500 HD’s engine parts and components will change. When something breaks, we're ready. Select a repair or category to learn more about 2015 GMC Sierra 3500 HD services.

We Care for GMC Sierra 3500 HD Engines

GMC Sierra 3500 HD drivers trust that their Sierra 3500 HD will take them near and far. That might be why you bought it in the first place. Even so, pieces and parts can break down over time. Things can go sideways sometimes. If they do, you’ll have to find a dependable 2015 GMC service center — quick! That's when it's time to head to Firestone Complete Auto Care. We've serviced more than 500 million vehicles since 1926, and our technicians know GMC Sierra 3500 HD engines. Schedule a courtesy inspection at the first sign of engine trouble. After all, Firestone Complete Auto Care is one of the most popular picks for professional engine repairs thanks to its service and affordability.

My 2015 GMC Sierra 3500 HD Check Engine Light Is On

An illuminated check engine light on your GMC Sierra 3500 HD is one of the first signs it's time to 'brake' for engine service. A check engine light that’s on or flashing could be a symptom of a serious problem in your or emission system, and it won’t go away by ignoring it. Possible causes can include a failing oxygen sensor, damaged spark plug, a problem with your catalytic converter, or a leaking engine vacuum, but that's only a few of the possible causes. Bring your Sierra 3500 HD to Firestone Complete Auto Care to get computerized diagnostics and we'll determine exactly why your check engine light is on. engine pinging noises, essential fluid leaks, or engine misfiring.

GMC Sierra 3500 HD Engine Repair

When your GMC Sierra 3500 HD engine needs repairs, our technicians will make sure you understand what’s going on before they start working on your engine. We don't start working until we have your approval. If a repair can wait, we'll let you know. We'll also tell you if it's necessary for your safety. We want to give you all the details you need to make an informed decision about your engine repairs. By choosing Firestone Complete Auto Care for Sierra 3500 HD engine repairs and you can drive easy knowing that we use GMC-approved parts and fluids — cambelt, motor oil seal, fuses, or a different component.

Engine Q&A 2015 GMC Sierra 3500 HD

Why does the check engine light come on when I start my Sierra 3500 HD? It's okay if your check engine light comes on when you first start your vehicle. This is a sign that your vehicle is testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Why does my GMC engine sound different? Strange under-the-hood noises can point to problems within your GMC Sierra 3500 HD engine. Knocking or tapping could be a symptom of low oil. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing may be caused by a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage my GMC Sierra 3500 HD engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car is in Park, or accelerating too quickly, too soon. Steer clear of these habits to help protect engine performance and efficiency.
Can I add water to my GMC Sierra 3500 HD radiator? It’s not recommended you put water in your Sierra 3500 HD radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.
What can cause the engine in my Sierra 3500 HD to suddenly stop? There are different reasons your Sierra 3500 HD vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.
Who can repair my GMC Sierra 3500 HD engine? Your local Firestone Complete Auto Care offers GMC Sierra 3500 HD engine repair. Schedule an appointment today at one of our thousands of locations nationwide!