Why does the check engine light in my Sierra 3500 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 just your Sierra 3500 HD testing its circuits. The light should turn off in a bit, but come see us if it doesn't.

Why is my GMC Sierra 3500 HD making engine noise?

Unusual noises can signal a problem with your GMC Sierra 3500 HD engine. Tapping or knocking could mean you need an oil change. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage my GMC Sierra 3500 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 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 3500 HD radiator?

While it’s not recommended, you can use water in your Sierra 3500 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 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 fixes GMC Sierra 3500 HD engines?

Your local Firestone Complete Auto Care has you covered with expert Sierra 3500 HD engine repair. Schedule an appointment today and see us at one of our thousands of locations.

Reliable Repairs for 2020 GMC Sierra 3500 HD Engines

Learn about

2020 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.

V8/6.6L

GMC Sierra 3500 HD Repairs and Services

Nothing stays the same forever. Even your GMC Sierra 3500 HD's many parts and pieces. When something breaks or fails, we’re ready to help. Click on a repair below to learn more about 2020 GMC Sierra 3500 HD repairs.

We’re Trained to Care for GMC Sierra 3500 HD Engines

The GMC Sierra 3500 HD is respected for its reliability. You probably thought about that when you got it. Even so, pieces and parts can break down over time. Things can go wrong on the road. When they do, you might find yourself searching for 2020 GMC Sierra 3500 HD engine repair or replacement parts. That’s where Firestone Complete Auto Care comes in. We've serviced millions of vehicles since 1926, and our professional technicians are trained to service GMC Sierra 3500 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 2020 GMC Sierra 3500 HD

If your Sierra 3500 HD check engine light is on, it’s time to get it looked at. A check engine light that’s flashing or steadily illuminated could point to problems with your fuel, Causes may include a faulty oxygen sensor, bad spark plug, a clogged catalytic converter, or an engine vacuum leak, to name a few potential sources. Bring your Sierra 3500 HD in for an on-board diagnostic check and our expert techs will get the root of the problem. rattling sounds, burning smells, or engine misfiring.

GMC Sierra 3500 HD Engine Repair

If your 2020 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 make recommendations, but you make the final decision. If a repair isn’t urgent right now, we’ll let you know. We'll also tell you if it's necessary for your safety. 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 3500 HD engine repairs and you can feel good knowing that we only use GMC-compliant replacement parts such as the timing belt, valve guide seal, fuses, or another part.

Engine Q&A 2020 GMC Sierra 3500 HD

Why does the check engine light in my Sierra 3500 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 just your Sierra 3500 HD testing its circuits. The light should turn off in a bit, but come see us if it doesn't.
Why is my GMC Sierra 3500 HD making engine noise? Unusual noises can signal a problem with your GMC Sierra 3500 HD engine. Tapping or knocking could mean you need an oil change. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage my GMC Sierra 3500 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 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 3500 HD radiator? While it’s not recommended, you can use water in your Sierra 3500 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 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 fixes GMC Sierra 3500 HD engines? Your local Firestone Complete Auto Care has you covered with expert Sierra 3500 HD engine repair. Schedule an appointment today and see us at one of our thousands of locations.