Why does my Sierra 2500 HD’s check engine light come on when I start it?

It's okay if your check engine light comes on when you first start your vehicle. This is just your Sierra 2500 HD testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Why is my GMC Sierra 2500 HD making engine noise?

Strange under-the-hood noises can point to problems within your GMC Sierra 2500 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 can be traced back to a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.

What could damage a GMC engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your GMC Sierra 2500 HD engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving the engine while still in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Protect your engine’s performance and efficiency by distancing yourself from these habits.

Can I use water in my GMC Sierra 2500 HD radiator?

Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.

What can cause a Sierra 2500 HD engine to suddenly stop?

There are different reasons your Sierra 2500 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.

Where can I go for GMC Sierra 2500 HD repair?

For GMC Sierra 2500 HD engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.

Reliable Repairs for 2015 GMC Sierra 2500 HD Engines

Learn about

2015 GMC Sierra 2500 HD Trim Options

Select your GMC Sierra 2500 HD trim level to learn more about GMC-recommended engine repair. Use the following chart to find information.

V8/6.0L

V8/6.6L

Repairs for Your 2015 GMC Sierra 2500 HD

Nothing stays the same forever. Even your GMC Sierra 2500 HD’s engine parts and components will change. When something breaks or fails, we’re ready to help. Click on a repair below to learn more about 2015 GMC Sierra 2500 HD repairs.

We’re Trained to Care for GMC Sierra 2500 HD Engines

GMC Sierra 2500 HD drivers trust that their Sierra 2500 HD will take them near and far. That might be why you bought it in the first place. However, the wear-proof engine has yet to be invented! Sometimes plans go sideways. If they do, you’ll have to find a dependable 2015 GMC service center — quick! That’s where Firestone Complete Auto Care comes in. We've serviced more than 500 million vehicles since 1926, and our technicians know GMC Sierra 2500 HD engines. Schedule an appointment if you're experiencing problems that could require engine repair. After all, Firestone Complete Auto Care is one of the most popular picks for professional engine repairs thanks to its service and affordability.

Check Engine Light on 2015 GMC Sierra 2500 HD

An illuminated check engine light on your GMC Sierra 2500 HD is one of the first signs it's time to 'brake' for engine service. A steady or flashing check engine light could signal a serious issue with your car’s ignition, Causes may include a faulty oxygen sensor, damaged spark plug, issues with your catalytic converter, or an engine vacuum leak, to name a few potential sources. Stop by your local Firestone Complete Auto Care to get your Sierra 2500 HD issues diagnosed and our expert techs will get the root of the problem. rattling sounds, oil leaks, or engine misfiring.

2015 Sierra 2500 HD Engine Services

If your 2015 Sierra 2500 HD engine needs repairs, our technicians will provide you with a thorough explanation beforehand. We don't start working until we have your approval. If a service can wait, we’ll make sure you know. If it's necessary for your safety, we'll make sure you understand that, too. We seek to give you all the info you need to make a smart decision about our services. Choose Firestone Complete Auto Care for GMC Sierra 2500 HD engine repairs and you can drive easy knowing that we use GMC-approved parts and fluids — serpentine belt, valve guide seal, ignition coil, or a different component.

Engine Q&A 2015 GMC Sierra 2500 HD

Why does my Sierra 2500 HD’s check engine light come on when I start it? It's okay if your check engine light comes on when you first start your vehicle. This is just your Sierra 2500 HD testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Why is my GMC Sierra 2500 HD making engine noise? Strange under-the-hood noises can point to problems within your GMC Sierra 2500 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 can be traced back to a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.
What could damage a GMC engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your GMC Sierra 2500 HD engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving the engine while still in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Protect your engine’s performance and efficiency by distancing yourself from these habits.
Can I use water in my GMC Sierra 2500 HD radiator? Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.
What can cause a Sierra 2500 HD engine to suddenly stop? There are different reasons your Sierra 2500 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.
Where can I go for GMC Sierra 2500 HD repair? For GMC Sierra 2500 HD engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.