The robust L5P Duramax engine was developed by General Motors for the 2017 Chevrolet Silverado 2500HD and 3500HD trucks and GMC Sierra 2500HD and 3500HD trucks. The original 2017 Duramax motor has been upgraded and updated to further increase the engine’s reliability. Today, 445 horsepower and 910 lb-ft of torque make the L5P one of the market’s most powerful and efficient diesel engines.
Diesel engine fuel systems, which rely on high-pressure fuel pumps and precise injector timing, are more complex than gasoline engines. Like any engine, the L5P Duramax engine experiences regular wear and must be properly cared for to extend its lifespan. Discover common symptoms and solutions, and see how Hot Shot’s Secret additives can help L5P owners get the most out of their engines.
Common L5P Duramax Problems
All engines are susceptible to wear over time. Problems with the L5P Duramax engine can send inaccurate readings to the engine control unit (ECU), which controls the subsystems of an internal combustion engine. As the vehicle’s “brain,” faulty ECU readings can result in various performance issues in your L5P Duramax engine. This malfunction hinders the engine’s reliability and can lead to damage.
Problems with your engine components can lead to overall system failures and high repair costs, especially if they are not promptly and effectively addressed. Know the symptoms of common L5P Duramax problems to accurately diagnose and correct the root issue.
1. Turbocharger Failure
Signs of turbocharger failure may include a loss of power, unusual whining noises and excessive exhaust smoke. Turbo issues in the L5P Duramax engine are caused by boost leaks, oil contamination and excessive exhaust temperatures. If left untreated, these problems can lead to a blown turbocharger.
2. Fuel Injector Problems
Carbon and internal injector deposits can clog your engine’s fuel injector. You may notice rough idling, poor fuel economy and stalling while driving or towing. These symptoms can cause the L5P engine to misfire and fail. Driving a vehicle with a faulty fuel injector is generally not recommended because it can significantly damage the DPF and other engine components.
3. High Exhaust Temperatures
Increased exhaust gas temperatures (EGTs) can negatively affect your vehicle’s performance. A safe range for normal driving and towing is 1,250-1,300°F. Higher EGTs can be reached during aggressive towing but should be closely monitored to avoid overheating. High EGTs can cause long-term engine damage if they are not properly managed.
4. Defueling and Limp Mode
Limp mode, the safety feature that reduces engine performance, can be triggered by turbocharger malfunctions and a faulty exhaust gas recirculation (EGR) system. Over time, the EGRS can become clogged with carbon deposits.
5. Diesel Particulate Filter Clogging
The diesel particulate filter (DPF) can become clogged, leading to reduced performance, increased fuel consumption and potentially costly repairs. You may notice a strong diesel fuel odor and black smoke from the exhaust pipe. A DPF warning light may glow on the dashboard. Severe clogs will need to be repaired or replaced by a professional to avoid further complications to the engine.
How Hot Shot’s Secret Products Help Solve Common L5P Duramax Problems
Hot Shot’s Secret manufactures products to help solve and prevent common automotive issues. Our industrial-grade products are powered by science and triple-threat tested to make L5P Duramax engines more efficient. Explore our free DIY diesel engine diagnostics tool to uncover solutions.
Let’s take a closer look at how you can use Hot Shot’s Secret products to combat L5P Duramax engine problems.
1. Turbocharger and Injector Protection
Hot Shot’s Secret Stiction Eliminator cleans and lubricates everything the engine touches, addressing and preventing buildup in your turbocharger, rings, oil pump, pistons and more. This unique blend of synthetic cleaner and proprietary carbon nano lubricant can improve your fuel economy. It should be added with a fresh oil change and is formulated to work throughout the oil’s life.
2. Combating High Exhaust Temperatures
Sustained high exhaust temperatures are attributed to the thermal expansion of engine parts and reduced NOx conversion efficiency. Extreme Diesel Treatment by Hot Shot’s Secret can improve combustion efficiency and lower exhaust temperatures by reducing soot buildup. It is a concentrated 6-in-1 treatment that enhances fuel economy in all diesel engines and can be used at every fill-up.
Try EDT+ Winter Defense to prevent diesel fuel from gelling and icing in cold weather.
3. Diesel Particle Filter and Emissions System Maintenance
As part of your engine’s emissions system, a clean DPF is necessary for removing excess soot. Premium DEFender™ maintains the DPF while cleaning, lubricating and protecting the entire selective catalytic reduction (SCR) system.
When used each time you refill your diesel exhaust fluid, Premium DEFender also prevents DEF crystal formation and buildup, which improves fuel economy and reduces the risk of needing costly repairs.
4. Fuel System Cleaning and Protection
Diesel Extreme removes deposits from the fuel injectors and lines, restoring your engine’s power and efficiency while reducing misfires. This popular diesel fuel additive comes in a large range of sizes, from 16 ounces to 5 gallons.
5. Long-Term Engine Health
Hot Shot’s Secret Everyday Diesel Treatment (EDT) contributes to overall engine health and longevity, reducing wear and improving performance over time. When combined with preventive maintenance, this fuel additive can keep your engine running well for many years to come.
L5P Duramax Reliability and Lifespan Extension
The L5P is generally considered a reliable engine for heavy-duty cars and trucks. The L5P Duramax life expectancy is 350,000 miles, and it is higher for engines in great condition. The L5P Duramax engine features a solid build and impressive towing capability.
Don’t wait until there is severe damage to take action. To keep your engine in peak condition and avoid common L5P problems, it is crucial that you implement effective maintenance practices:
- Regularly change the oil: Achieve optimal performance and prevent contaminant buildup by changing your diesel oil on a regular basis. Doing so supports your L5P Duramax’s overall health. Follow the manufacturer’s guidelines for oil change frequency.
- Inspect filters: Clogs from dust, debris, soot and other contaminants can restrict airflow in the engine. A dirty filter can decrease your truck’s fuel efficiency, requiring frequent fill-ups and strain on the fuel pump.
- Monitor coolant temperatures: Keep your engine operating within its optimal range to maximize its lifespan and prevent problems. High heat can cause head gasket failure or even engine seizure, and extreme cold reduces fuel efficiency. Inspect the system’s hoses and connections for leaks.
- Keep the turbo clean: Contaminants can hinder your turbocharger’s ability to provide the necessary boost. Reduce premature wear by thoroughly cleaning the turbo on a regular basis.
- Properly use fuel and oil additives: Stiction Eliminator, Diesel Extreme and other Hot Shot’s Secret products can contribute to the longevity and reliability of your L5P Duramax engine. Explore our high-quality product bundles to get the additives your L5P engine needs to thrive.
- Maintain proper tire pressure: Tire pressure greatly impacts your vehicle’s fuel economy. The manufacturer’s manual will outline the ideal tire pressure range.
- Practice good driving and towing habits: Aggressive driving and overloading can strain your engine excessively, causing premature wear and extra soot buildup. Avoid short stop-and-go driving and idling.
Take safety precautions while working on an L5P diesel engine. These steps include wearing gloves and goggles and ensuring the area is clear of hazards. If you lack the necessary skills and tools to work on your diesel engine, we recommend that you seek assistance from a qualified mechanic.
The Best Approach for L5P Duramax Owners
Manufactured by General Motors, the L5P Duramax engine is a reliable, powerful diesel engine. It is an excellent choice for heavy-duty applications. Regular maintenance can combat common 2021 L5P Duramax problems, extending its lifespan. These issues include turbocharger failure, faulty fuel injectors, high EGTs, limp mode and clogged DPF.
We are driven to serve our customers. When you use Hot Shot’s Secret innovative products and implement proper maintenance practices, you can significantly extend the life and maximize the performance of your L5P diesel engine. Our scientifically proven fuel additives are safe and effective for all engines, providing the protection and benefits your vehicle needs. Prevent common L5P Duramax problems and costly repairs by shopping Hot Shot’s Secret’s powerful product line.