Why does the check engine light in my C3500 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.

Are GMC C3500 engine noises bad?

Strange engine sounds can be a sign something’s off in your GMC C3500. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate 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 C3500 engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, 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.

Can I use water in my GMC C3500 radiator?

It’s not recommended you put water in your C3500 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 could cause my C3500 engine to suddenly stop?

Your C3500 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.

Where can I go for GMC C3500 repair?

Your local Firestone Complete Auto Care offers GMC C3500 engine repair. Schedule an appointment today at one of our thousands of locations nationwide!

Reliable Repairs for 1999 GMC C3500 Engines

Learn about

1999 GMC C3500 Trim Options

Select your GMC C3500 trim level to learn more about GMC-recommended engine repair. Even GMC C3500 parts will get older and change.

V8/5.7L

V8/6.5L

V8/7.4L

GMC C3500 Repairs and Services

Nothing stays the same forever. Even your GMC C3500’s engine parts and components will change. When something breaks, we're ready. Select a service or repair below to learn more about what we can do for your 1999 GMC C3500.

We Know GMC C3500 Engines

GMC C3500 drivers trust that their C3500 will take them near and far. You probably thought about that when you got it. Even so, pieces and parts can break down over time. Sometimes plans go sideways. If they do, you’ll have to find a dependable 1999 GMC service center — quick! Luckily, you won’t have to look far, since Firestone Complete Auto Care has 1,700+ locations across the country. We've serviced more than 500 million vehicles since 1926, and our technicians know GMC C3500 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.

Illuminated Check Engine Light on 1999 GMC C3500

As soon as your C3500 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 vehicle's ignition, Possible causes can include a failing oxygen sensor, worn spark plug, issues with your catalytic converter, or a leaking engine vacuum, but that's only a few of the possible causes. Bring your C3500 in for an on-board diagnostic check and we'll determine exactly why your check engine light is on. Other signs your GMC C3500 engine needs some TLC are essential fluid leaks, or engine misfiring.

GMC C3500 Engine Repair

If your 1999 GMC C3500 needs engine repair, our expert techs will let you know what needs to be done and why before they get started. We make recommendations, but you make the final decision. If a repair isn’t urgent right now, 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 C3500 engine repairs and you can feel good knowing that we only use GMC-compliant replacement parts such as the timing belt, oil gasket, fuses, or another part.

Questions About 1999 GMC C3500 Engines

Why does the check engine light in my C3500 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.
Are GMC C3500 engine noises bad? Strange engine sounds can be a sign something’s off in your GMC C3500. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate 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 C3500 engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, 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.
Can I use water in my GMC C3500 radiator? It’s not recommended you put water in your C3500 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 could cause my C3500 engine to suddenly stop? Your C3500 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.
Where can I go for GMC C3500 repair? Your local Firestone Complete Auto Care offers GMC C3500 engine repair. Schedule an appointment today at one of our thousands of locations nationwide!