Why does the check engine light in my Sierra 2500 HD turn on when I start my car?

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 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. 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 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,' 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.

Is it okay to put water in my GMC Sierra 2500 HD radiator?

While it’s not recommended, you can use water in your Sierra 2500 HD radiator in emergencies. Normally, you should only use a 50/50 mix of coolant and water or a pre-mixed coolant. However, if you are completely out of coolant and must continue driving, it’s better to have water in your coolant reservoir than nothing.

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

Your Sierra 2500 HD car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.

Who fixes GMC Sierra 2500 HD engines?

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

2018 GMC Sierra 2500 HD Engine Repair

Learn about

2018 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

2018 GMC Sierra 2500 HD Repair

Nothing lasts forever. Even your GMC Sierra 2500 HD’s engine parts and components will change. When something breaks, we're ready. Select a repair or category to learn more about 2018 GMC Sierra 2500 HD services.

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

The GMC Sierra 2500 HD is respected for its 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. When they do, you might find yourself searching for 2018 GMC Sierra 2500 HD engine repair or replacement parts. 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 2500 HD engines. Schedule an appointment if you're experiencing problems that could require engine repair. Firestone Complete Auto Care is a top choice for professional engine diagnosis, service, and repair at an affordable price.

Check Engine Light on 2018 GMC Sierra 2500 HD

As soon as your Sierra 2500 HD check engine light turns on, it’s time to get an expert’s opinion. A check engine light that’s on or flashing could be a symptom of a serious problem in your or emission control system that won’t go away on its own. Causes may include a faulty oxygen sensor, damaged spark plug, a clogged catalytic converter, or a leak in the engine vacuum, but that's only a few of the possible causes. Bring your Sierra 2500 HD in for an on-board diagnostic check and our expert techs will get the root of the problem. Other signs your GMC Sierra 2500 HD engine needs some TLC are burning smells, or engine misfiring.

Engine Repairs for Your 2018 Sierra 2500 HD

When your GMC 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 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. Choose Firestone Complete Auto Care for GMC Sierra 2500 HD engine repairs and you can feel good knowing that we only use GMC-compliant replacement parts such as the serpentine belt, valve guide seal, fuses, or a different component.

Engine Q&A 2018 GMC Sierra 2500 HD

Why does the check engine light in my Sierra 2500 HD turn on when I start my car? 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 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. 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 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,' 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.
Is it okay to put water in my GMC Sierra 2500 HD radiator? While it’s not recommended, you can use water in your Sierra 2500 HD radiator in emergencies. Normally, you should only use a 50/50 mix of coolant and water or a pre-mixed coolant. However, if you are completely out of coolant and must continue driving, it’s better to have water in your coolant reservoir than nothing.
What can cause a Sierra 2500 HD engine to suddenly stop? Your Sierra 2500 HD car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.
Who fixes GMC Sierra 2500 HD engines? Your local Firestone Complete Auto Care fixes GMC Sierra 2500 HD engines. Book an appointment today! We have thousands of locations across the country.