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 does my GMC engine sound different?

Unusual noises can signal a problem with your GMC Sierra 2500 HD engine. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. 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 my GMC Sierra 2500 HD engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving your engine while the vehicle is in Park, or accelerating too quickly, too soon. Protect your engine’s performance and efficiency by distancing yourself from these habits.

Is it okay to put 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?

If your Sierra 2500 HD car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.

Who can repair my GMC Sierra 2500 HD engine?

Your local Firestone Complete Auto Care fixes GMC Sierra 2500 HD engines. Book an appointment today! We have thousands of locations across the country.

Engine Repairs for Your 2019 GMC Sierra 2500 HD

Learn about

2019 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 2019 GMC Sierra 2500 HD

Nothing stays the same forever. Even your GMC Sierra 2500 HD’s engine parts and components will change. We’re here to help when something stops working. Select a repair or category to learn more about 2019 GMC Sierra 2500 HD services.

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

GMC Sierra 2500 HD engines are known for their reliability. That might be why you bought it in the first place. However, the wear-proof engine has yet to be invented! Things can go sideways sometimes. If they do, you’ll have to find a dependable 2019 GMC service center — quick! That's when it's time to head to Firestone Complete Auto Care. Since 1926, we’ve taken care of 500 million+ cars, so you can rest assured knowing your GMC Sierra 2500 HD engine will be in good hands. Schedule an appointment if you're experiencing problems that could require engine repair. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

My 2019 GMC Sierra 2500 HD Check Engine Light Is On

As soon as your Sierra 2500 HD check engine light turns on, it’s time to get an expert’s opinion. A steady or flashing check engine light could signal a serious issue with your fuel, Causes may include a faulty oxygen sensor, worn spark plug, a clogged catalytic converter, or a leaking engine vacuum, but that's only a few of the possible causes. 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, essential fluid leaks, or engine misfiring.

2019 Sierra 2500 HD Engine Services

If your 2019 GMC Sierra 2500 HD needs engine repair, our expert techs will let you know what needs to be done and why before they get started. We don't start working until we have your approval. If a repair can wait, we'll let you know. But if immediate repairs are necessary for your safety, we’ll make sure that's clear, too. We want to provide you with the information you need to make an informed engine repair decision. By choosing Firestone Complete Auto Care for Sierra 2500 HD engine repairs and you can feel confident knowing that we use GMC-approved parts and components like the cambelt, valve guide seal, sensors, or another part.

2019 GMC Sierra 2500 HD Engine Q&A

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 does my GMC engine sound different? Unusual noises can signal a problem with your GMC Sierra 2500 HD engine. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. 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 my GMC Sierra 2500 HD engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving your engine while the vehicle is in Park, or accelerating too quickly, too soon. Protect your engine’s performance and efficiency by distancing yourself from these habits.
Is it okay to put 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? If your Sierra 2500 HD car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.
Who can repair my GMC Sierra 2500 HD engine? Your local Firestone Complete Auto Care fixes GMC Sierra 2500 HD engines. Book an appointment today! We have thousands of locations across the country.