Quick Answer

How reliable is the L5P Duramax?

The L5P is considered the most reliable post-emissions Duramax made to date. With the removal of the CP4. 2 fuel injection pump and various improvements made to the block, pistons, and other internals, the engine itself is extremely capable and reliable.

What years should I not buy a Duramax?

Quick Answer: Avoid Duramax Year Models 2001-2010

In short, the newer model years show improved performance. The very first engine was the 6.6L Duramax LB7 that was used in the 2001 – 2004 Chevrolet Kodiak, Chevrolet Silverado, GMC Topkick, and GMC Sierra HD.

What is the most reliable year of Duramax?

Some engines are more popular than others. For example, the pre-emissions Duramax engines made between 2001 and 2007 are highly sought-after for superior reliability. On the other hand, the more modern engines add more horsepower, torque, and upgrade capability with Duramax performance parts.

Are LMM Duramax a good engine?

Consistent to its very similar LBZ counterpart, the LMM is a highly reliable engine. The DPF is a hot-spot for failure so beware that you will probably end up with a few thousand dollars of DPF/emissions repairs, however you can *illegaly* remove this potential problem by removing the DPF system.

Is the L5P a good motor?

The L5P Duramax is a version of the V8 diesel Duramax that was introduced in 2017 and with 445HP and 910-pound feet of torque, it is the most powerful pickup truck engine from GM. It is described by many as a muscle truck because of the sheer power that this engine produces.

What year Duramax have injector Problems?

What year Duramax has injector problems? The LB7 Duramax built from 2001 – 2004.5 is known for injector failure. The good news is the replacement injectors you purchase from us incorporate several updates to help prevent repeat failures.

What generation Duramax is best?

6.6L Duramax LB7 – Overall Best Diesel Engine. The LB7 Duramax was first introduced in 2001 when GM discontinued its 6.5L Detroit diesel. The Duramax was superior in performance to the Detroit and marked an important turning point for Chevrolet pickups and GMC trucks in the diesel market.

Which diesel engine is the most reliable?

The 7.3L Powerstroke is still considered one of the most reliable diesel engines ever made. It also has plenty of power for most applications, with 500 pound-feet of torque and 235 horsepower. It was built for the long haul, too with an air-to-air intercooler, oil-based fueling, and durable internal hard parts.

What is high mileage for a 6.6 Duramax diesel?

As for what’s considered high mileage for specific diesel engines? According to Prosource Diesel, anything over 350,000-miles is considered high mileage for a used diesel pickup with a Cummins or Duramax engine under its hood. Anything over 350,000-miles is also regarded as high mileage for a Powerstroke diesel engine.

What Duramax gets the best mpg?

Naturally, the 2.8L Duramax diesel achieves the best gas mileage with 23 mpg combined and an impressive 30 mpg on the highway for two-wheel-drive models.

What does LBZ stand for Duramax?

2004.5-2006 = lly. 2006-2007.5 = lbz (classic body style) 2007.5 – = lmm (new body style) if you have the new body style, you have the lmm. -Kyle.

How much does it cost to replace a Duramax engine?

Depending on on the rebuilder, a Duramax engine replacement is going to cost at least $15,000. Depending on the year and other potential issues or wishes of the customer, you could expect a range likely between $15,000 and $25,000 for Duramax engine replacement.

What’s better LMM or LBZ?

LBZ does not have DPF so no urea tank to fill. LMM does have DPF. Thats the main big difference other than the body style change. DPF kills the mileage and performace on the LMM, but you can delete the dpf which is illegal but if you know someone that will pass it for inspection you will be fine.

Is LMM or LML better?

LML is arguably a better engine but there are issues with DEF on all makes
Ford, Ram and GM. LMM emission controls have proved to be as reliable as any.

What’s the difference between LML and LMM?

LML has a newer chassis and updated suspension, not sure how much better they ride or if that is a selling point for you. They are also going to have a higher GVWR… -LMM has the same pistons as the LBZ, which some say or the weak link in the motor, should be an issue unless your pushing over 600hp though…

How much HP can a stock L5P handle?

The Stock Injection Pump Can Support 770rwhp!

Can you delete an L5P?

6.6L Duramax L5P DPF Delete Summary

Deleting the L5P DPF will remove not only the DPF but also the DOC and SCR components, and the need for DEF fluid. The EGR must be deleted separately. All of these emissions systems are prone to clogging and failure. And replacing them costs thousands of dollars.

Does L5P have a lift pump?

L5P Filtration Upgrades

After 15 years of building Duramax trucks without a lift pump, GM finally learned their lesson and with the introduction of the L5P, they finally equipped their trucks with a lift pump.

What problems does the 6.6 Duramax have?

Common 6.6L Duramax Diesel Engine Problems

  • Fuel Injector Failure.
  • Fuel Injector Harness Chafing.
  • Fuel Starvation, Air in Fuel Lines.
  • Water Pump Failure.
  • Engine Overheating, High Engine Coolant Temperature, Blown Head Gasket(s)
  • Glow Plug Failure, Glow Plug Tips Breaking.
  • Turbocharger Oil Ingestion (PCV Design Flaw)

How do I know if my Duramax needs injectors?

Symptoms of Failing Duramax Fuel Injectors

  1. Excessive Smoke.
  2. Power Loss.
  3. Rough Idle.
  4. Fuel in Oil.
  5. High Return Fuel.
  6. No Start.

Which is better Duramax or Cummins?

The current Cummins engine is a 6.7-liter inline-six, while the Duramax is a 6.6-liter V8. The Duramax leads with horsepower, but the Cummins is the king of torque with numbers up to 1,000 ft-lbs depending on the truck.

What is the strongest Duramax engine?

L5P. The L5P duramax is the latest version of the Duramax V8 diesel engine. (engine code Y) Introduced in the 2017 model year it is the most powerful diesel pickup truck engine GM has produced with 445 hp (332 kW) at 2,800 rpm and 910 lb⋅ft (1,234 N⋅m) at 1,600 rpm.

Are 6.6 Duramax reliable?

Duramax engines are extremely reliable over time
there are plenty on the road today that still runs like new even though they’re approaching or exceeding 100,000 miles!

How long does a Duramax diesel last?

The Duramax engine should last up to 300,000 miles before needing major repairs if you are wondering how long it will last. The number of miles an engine can run depends on how well it was maintained and driven over its lifetime.

What is the most reliable diesel engine in a pickup truck?

Many consider the Duramax 6.6-liter (Chevy/GM), the Cummins 6.7-liter (Dodge) and the Powerstroke 6.7-liter as the best diesel engines available for 2021-2022 pickup trucks.

What is the longest lasting diesel engine?

What is the Most Reliable Diesel Engine Ever? The most reliable diesel engine ever made was the 5.9L Cummins 12-Valve 6BT. The 5.9L 12-Valve has million-mile durability.

Is 200 000 miles alot for a Duramax?

Even when used extensively for towing and hauling, Powerstroke, Cummins and Duramax diesel trucks typically last well beyond 100,000 miles. Because of that, it’s not uncommon to see diesel pickups with 200,000 and even 300,000 miles commanding good resale values on the used truck market.

How long will an Allison 1000 last?

These trucks can (and do) regularly hit 200,000 miles. The truck and drivetrain will only last as long as you maintain it, though. There are parts that fail, just like anything else. But regular maintenance (fluid changes, body upkeep, hard part care) will help you have a very long relationship with your truck.

Should I buy a diesel with 200k miles?

Diesel trucks such as Powerstroke, Cummins, and Duramax typically last well beyond 100,000 miles even when used extensively for towing and hauling. As a result, diesel trucks with 200,000 and even 300,000 miles are often very valuable on the used truck market because of their resale value.