Are there any problems with the LLY Duramax?

In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring.

Are there any problems with the Duramax diesel engine?

Overheating issues with the Duramax diesel seems to be a hit-or-miss problem; some owners experience it, while others never will. Regardless, it’s more common with the Duramax than other engines.

What kind of differential does a Duramax LB7 have?

At a stock power level, the stock Allison usually does an OK job at transferring the torque from the flywheel to the rear differential, but even a bone stock LB7 can put a hurting on the Allison, so you can only imagine what happens when you turn up the wick or hook up an oversized as many truck owners often do.

What was the problem with the LBZ Duramax in 2006?

Glow plug failure was a concern on the 2006 model year LBZ and LLY Duramax models, but the problem should have been long corrected for owners of these years. The concern was that the glow plug module would over cycle the glow plugs, creating a scenario in which the tip of the glow plug could actually deform and/or break off in the engine.

Are there any problems with the Allison Transmission?

Allison transmissions are custom-designed for several different industries and provide valuable power and work. However, even these revolutionary pieces of equipment can have problems. Do you know how to identify and deal with an issue that may arise with your Allison transmission?

What kind of transmission does a Duramax diesel use?

It was the first to come bolted to the six-speed Allison transmission which provides a lower cruising RPM and greater fuel efficiency when compared to the five-speed on the LB7 and LLY.

Are there any flaws in the Cummins Duramax?

Still, and just as we exposed the shortcomings of the almighty Cummins, the Duramax isn’t without its flaws—some of them catastrophic. For example, did you know the injection pump on the LML version is prone to coming apart and wrecking the entire high-pressure fuel system when it does?

What was the code name for the Duramax in 2011?

In an effort to keep up with the ever-tightening emission regulations, GM redesigned its Duramax for the 2011 model year, and this time the code name was LML.

How many versions of the Duramax diesel engine are there?

All told, there are six different iterations of the Duramax diesel engine: LB7, LLY, LBZ, LMM, LML, and L5P spanning from 2001 to the present day. Each version of the engine has its own issues and quirks, and some are less problematic than others.

What kind of transmission does a Duramax pickup have?

Nearly all Duramax powered pickup trucks were equipped with the Allison 1000 automatic transmission, with the five-speed version running from 2001 to 2005, and the six-speed starting in 2006 and running until 2019.

What kind of transmission does a Duramax have?

Engine: 6.6L LB7 Duramax V8 with Bosch common-rail injection system Transmission (s): Allison 5-speed automatic, ZF-6 6-speed manual Best Year (s): Any year, as long as all 8 injectors have been replaced with genuine Bosch re-man units

When did the LMM Duramax Diesel come out?

A brand new body style, vastly improved interior, and a fresh version of the Duramax graced the ’07.5 to ’10 model year 2500 HD and 3500 trucks. In order to meet tougher emissions standards, the LMM Duramax would be the first 6.6L to dawn a diesel particulate filter, diesel oxidation catalyst and more extensive EGR system.

How many liters does a Duramax engine have?

Duramax engines have been produced globally since 2001, and include: From what we know, one Duramax engine was developed but was never put into production. Developed entirely in-house by GM and assigned RPO Code LMK, the engine displaced 4.5 liters from a V8 layout.

Why is my Duramax diesel engine not working?

The trucks computer keeps track of how much fuel needs to be added or subtracted from each individual cylinder to make the engine run smoothly, and this value is called the balance rate. If one cylinder is contributing too much or not as much as the rest, the cause is usually a bad injector and the cure is a replacement.

What to do if your Duramax cooler goes bad?

Lastly we replace a fair amount of glow plug controllers as well. You will usually get a diagnostic trouble code for the cooler when they go bad. Head Gaskets – As these truck reach the 100,000-150,000 miles we are seeing more and more head gasket issues. The Duramax has a multi-layer steel head gasket.

What causes a fuel filter to leak on a Duramax?

Fuel Filter Housing Oring Leaks – The Duramax fuel system does not have any sort of low pressure fuel pump pushing fuel to the engine from the tank. The injection pump sucks all the fuel from the tank.

Are there any problems with my 2003 Duramax?

Thaks for the help. injectors,water pump,headgaskets,injectors again,instrument cluster,steering shaft,pinion seal,and injectors again. I have on 03 with 66,000 on it and know problems. Friend of mine has 03 asmost same truck and know problems with 145,000 on it. Sure love mine. P:S Injectors should be warrantied to 200,000.

Are there any issues with the Duramax fuel pump?

The new injectors available from us and others are updated and do not have the cracking issue. Fuel Filter Housing Oring Leaks – The Duramax fuel system does not have any sort of low pressure fuel pump pushing fuel to the engine from the tank. The injection pump sucks all the fuel from the tank.

How long can a Duramax go out of service?

This special policy covers the condition described above for a period of 7 years or 200,000 miles (320,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. The repairs will be made at no charge to the customer.

Where do you drive a Chevy Silverado Duramax?

We drove the Silverado 1500 Duramax mostly in and around central Oregon’s valleys, exploring the outer reaches of prudence to maximize fuel efficiency and to experience the truck in a way no sane person ever will.

How much power does a Duramax Diesel have?

Power was at an all-time high coming in at 397hp and 765 pounds of torque, and in order to provide this much power while still keeping pollutants low, GM needed to be able to increase the pressure in the fuel system to levels above what the tried-and-true CP3 could safely deliver.

What makes a 3.0L Duramax better than a V6?

The 3.0L Duramax diesel inline-six engine design lends itself to efficiency. “The inline six is a naturally balanced engine,” Barta points out. “The result is we don’t need balance shafts and the engine only has one set of overhead cams (compared with two sets in a V6).

Are there any problems with my 2005 Chevy Silverado?

First dealer had it for a whole day and said it was fine, they saw NO smoke, then gave me some BS that any repairs would have to be done at a previous dealer (another city) since they changed 2 injectors already. Well after about another month it got worse and I called the GM warranty line.

Are there any problems with the Duramax fuel pump?

It can also be relatively difficult to prime the fuel system once air has been introduced into the system, such as when the fuel filter is changed. The 2001 to 2004 LB7 fuel filter housings seem to be the most prone to problems. Water pump failures for Duramax engine are somewhat common.

What causes a Duramax to overheat in the summer?

Overheating typically occurs while towing in the Summer months, and is most prevalent in 2005 or earlier models (2006+ models received a larger radiator and fan). Overheating often occurs as a result of a fan clutch failure, preventing the engine fan from providing supplemental airflow as necessary to keep the engine from overheating.

Are there any problems with the Commons 6.6L Duramax Diesel?

Common Problems with the 6.6L Duramax Diesel. The 6.6L Duramax has been in production since 2001 and has proved, on a large scale, to be a relatively reliable and durable platform. While various versions of the engine have surfaced over the years, all generations of the Duramax are based on the same foundation.

What causes the LLY Duramax Turbo mouthpiece to choke?

The LLY Duramax turbo air inlet manifold, sometimes called the turbo mouthpiece, forces the turbocharger to work harder than it needs to. It does this by essentially choking the turbo because of its small, restrictive design, forcing it to work harder to produce the same amount of boost. This results in excess heat and EGTs.

When does a LLY Duramax water pump fail?

While the seal issues found on LB7 trucks have been largely solved, the LLY Duramax can still suffer from water pump failure. Over time and at higher mileage, the seals in the factory water pumps can fail. This frequently occurs after 80-100,000 miles.

What are the most common Duramax 6.6L engine problems?

5 Most Common LBZ Duramax 6.6L Engine Problems. 1 1. LBZ Cracked Pistons. The LBZ is revered for its tune-only performance capabilities. With various upgrades, this engine is easily capable of 2 2. Duramax LBZ Water Pump Failure. 3 3. Glow Plug Failure – LBZ. 4 4. Allison 1000 Transmission Line Leaks. 5 5. Duramax EGR Problems.

Why are the glow plugs on my Duramax breaking?

The glow plugs are powered by a glow plug control module which sends the electrical current to heat them up. 2006 year models had a control module issue in which the module was known to overload the plugs with current, causing the tips of the glow plugs to actually break off.

Can a GMC Duramax run with no trailer?

Dropped the boat, let it sit a while then it ran great with no trailer. Took it back and they replaced “some fittings”. So 2 months later, I don’t fish near enough, I drove it 8 hrs to the coast and hooked up to a boat. It ran about 5 miles. Same thing , light comes on loss of power but can feather it up to 40-50 but cant push it.

What was the problem with my GMC Duramax?

The first 2 hours of the drive passed without incident, but at the 3rd or 4th stoplight, immediately after I told my wife the problem seemed to have been resolved, the light turned green and the truck couldn’t get up to speed. Happily this happened almost at the gate to a storage facility so I backed the trailer up the road and stored it.

What causes a Chevy 2500HD to lose power under load?

Probably P0087. Check the fuel hoses at the side of the trans– they can get kinked, weak and collapse. I’ve just experienced a very similar situation with my 2005 2500HD. After driving about 2 hours, over varying terrain, I had to stop at a light (not the first on the trip).

What’s the RPM on a 2005 GMC Duramax?

Check out the thread “2005 6.6 max rpm 2000”, there are some suggestions there. Also search for the “ice pick trick” as it is one of the suggestions that often comes up for this problem.

Which is the largest turbo on a Duramax?

One benefit for horsepower junkies is that the LLY made use of the largest turbo ever offered on any Duramax engine. Not only was its 62mm, 11-blade compressor wheel inducer the biggest, but the height of its exhaust vanes were the tallest at 15mm (vs. 11.2mm on the LML engine available from ’11-‘16).

Is there a problem with the glow plug on my Duramax?

Often, you can verify the problem by wiggling the wires around the injector. If the problem goes away (even momentarily), you’ve identified the affected zone. Glow plug failure was a concern on the 2006 model year LBZ and LLY Duramax models, but the problem should have been long corrected for owners of these years.

What are the most common LLY Duramax engine problems?

The 6 Most Common LLY Duramax Problems. 1 1. LLY Bent Rods. While the LLY made competitive performance numbers back in 2004, the engine is certainly not competitive to the modern day diesels. 2 2. Head Gasket Failure – LLY Duramax. 3 3. EGR Valve Failure. 4 4. Glow Plug Failue – 2006 LLY Duramax. 5 5. Overheating in Pre-2006 Models.

What kind of turbocharger does LLY Duramax use?

In addition to EGR, the LLY switched over to variable-vane turbocharger (VVT) which helped improve engine performance over its predecessor.

Are there any problems with the Duramax water pump?

This seems to be inherent of the factory water pump design. Overheating issues with the Duramax diesel seems to be a hit-or-miss problem; some owners experience it, while others never will. Regardless, it’s more common with the Duramax than other engines.

Overheating issues with the Duramax diesel seems to be a hit-or-miss problem; some owners experience it, while others never will. Regardless, it’s more common with the Duramax than other engines.

Why did my Chevy Duramax lose power under load?

Follow diagnostic chart, test system pressure, relief valve failed” so they replaced the FPRV. More limps and a year later there was a P0101 code indicating the Mass Air Flow (MAF) sensor failed so I had it replaced. The air filter was changed then too.

What’s the problem with my 2004 GMC Sierra?

2004 GMC Sierra 1500: Problem all gauges do not work all went… Customer Question Hello. I have A 2004… Hello. I have A 2004 GMC Sierra 1500 truck. Problem all gauges do not work all went out together. All other electrical work fine and truck runs great. What could the problem be, Thank you, XXXXX XXXXX E-mail:[email protected]

Why does my GMC Duramax not shift at all?

It is saying “service brake system” on the cluster and the abs and brake light is on. It has started doing all of this at the same time. Bump. Anyone have any ideas? I’m going to get an nsbu switch tomorrow and see if that will fix it. Do these sounds like symptoms of the nsbu switch?

What happens when a Duramax engine goes down?

Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants.

What kind of engine does a GM Duramax have?

It’s been said before, but that doesn’t make it any less true: The 6.6L Duramax is one heck of an engine. In stock form and even when substantially modified, GM’s legendary V8 diesel can provide hundreds of thousands of miles of trouble-free use.

How much does it cost to diagnose a GMC code?

Labor: 1.0 The cost of diagnosing the U0101 GMC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour. U0101 GMC Possible Symptoms Engine Light ON (or Service Engine Soon Warning Light) U0101 GMC Meaning

What is the diagnostic code for a Chevy Duramax?

Below are common check engine light trouble codes for the Chevy/GM Duramax diesel. This list has been updated to includes Chevy/GM Duramax diagnostic trouble codes. At Thoroughbred Diesel we are a real diesel performance and repair shop that offers free advice. Call us at 1-866-737-4966 with any questions you may have about your diesel.

Why are the head gaskets on my Duramax truck failing?

When you couple that with the biggest compressor wheel, the turbo has to work extremely hard which increases cylinder pressure and heat. Over time head gaskets naturally deteriorate and fail due to the heat and pressure they are subject to.

Where to buy a 2009 GMC Sierra 3500HD?

2009 Sierra 3500HD listings within 50 miles of your ZIP code. Get answers to buy with confidence. Save when you purchase multiple reports. Select from one or more dropdowns below, to find the right car for you.

In an effort to keep up with the ever-tightening emission regulations, GM redesigned its Duramax for the 2011 model year, and this time the code name was LML.

Are there any problems with the GM Duramax?

In stock form and even when substantially modified, GM’s legendary V8 diesel can provide hundreds of thousands of miles of trouble-free use. Still, and just as we exposed the shortcomings of the almighty Cummins, the Duramax isn’t without its flaws—some of them catastrophic.

What causes the injector on a Duramax to leak?

Leaking Injectors—LB7 One thing the ’01-’04 LB7 Duramax is notorious for is injector failure. The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat.

Why did my 2004 Duramax engine not start?

My 2004 Duramax started and then died like it was out of fuel. Now it won’t start. I have about 1/4 tank of fuel, tried priming it until the batteries died.

What should I do if my Duramax won’t start?

Very slight. Drove 5 miles, had dinner, came out, crank but no start. Held throttle down and still no start. Checked prime, fuel squirted out of vent when loosened. Cranked and held throttle down, started after about 10 seconds.

What causes a Duramax injection pump to fail?

As a result (allegedly), the lack of lubrication in the fuel can cause a premature failure of the injection pump, to a point where it won’t allow the LML Duramax to run. You can be driving down the road and everything seems normal, and when the pump fails, the truck just shuts off.

Is the GMC Duramax compatible with diesel fuel?

The Detroit News reports that GM is now facing a class-action suit alleging its 6.6-liter Duramax engine found in 2011-2016 Chevrolet and GMC models is not compatible with US diesel fuel.

When did I buy my new GMC Duramax?

I purchased a new 2020 GMC Denali 2500 with the Duramax back around March 14, 2020. The truck that I bought had right around 300 miles on it when I bought it. At 521 miles, I got the first CEL and immediately took it to my local GM dealer that happened to be a Chevrolet Dealer.

When did the GMC Duramax Denali 2500 come out?

Enter your ride HERE to be a part of this months Ride of the Month Challenge! I purchased a new 2020 GMC Denali 2500 with the Duramax back around March 14, 2020. The truck that I bought had right around 300 miles on it when I bought it.

The Detroit News reports that GM is now facing a class-action suit alleging its 6.6-liter Duramax engine found in 2011-2016 Chevrolet and GMC models is not compatible with US diesel fuel.

Where is the CP3 injection pump in a Duramax?

The CP3 injection pump sits in the valley of the engine between the cylinder heads and is driven by the camshaft gear, and it has two main jobs: get fuel from the tank up to the engine, and pressurize the fuel to 26,000psi and ultimately inject it into the engine.

Which is the best lift pump for a Duramax?

The FASS Titanium Signature Series Lift Pump is an excellent upgrade for any Duramax. When GM changed body styles with the 2008 Duramax, the redesign coincided with some new regulations from the EPA regarding emissions equipment on light duty trucks.

How many mpg does a GMC Duramax get?

All 2006 to 2019 Duramax light duty pickup trucks came with 6-speed Allison transmissions including my 2019. Moving on My 2019 averaged 14 mpg city and 17 mpg highway with the factory tires. With my lift kit and 35 inch tires I now average 12 mpg city and 15 mpg highway.

What causes head gasket failure on LLY Duramax?

Head Gasket Failure – LLY Duramax The LLY has the largest turbo in it out of any other 6.6L Duramax variants. Outside of it being the largest turbo, it had the largest compressor wheel and the tallest exhaust vanes. The end result is having an extremely efficient and high-flowing turbocharger.

Why is my Duramax LLY overheating at 50 mph?

The fan clutch on that old gasser would never engage at speeds above 50 MPH, even in the hottest ambient temperatures and towing the heaviest loads. Above that speed, there was always enough airflow over the radiator to keep the engine quite cool.

Why does my Chevy Duramax not turn over?

Engine won’t turn over with key at all. Batteries are hot. You can take a power probe and shoot 12v to starter solenoid wire and it will crank and run fine. I traced that wire back to the fuse panel under the hood on the driver’s side. There is a CRANK fuse as well as a starter relay in that panel.

When did the General Motors Duramax engine come out?

Duramax is a series of turbo-diesel engines produced by General Motors for use in pickup trucks, SUVs and vans. First introduced in 2001, Duramax engines range from four, six and eight cylinders in inline (I) or V configurations. A total of 11 Duramax engines have been produced since 2001 globally, including:

What causes a Duramax diesel engine to heat up?

When the engine is working hard, the turbocharger is drawing in a ton of air, and the restrictive stock turbo inlet tube can effectively choke the VGT turbocharger causing the compressor outlet temperature to skyrocket, heating up the intercooler, and ultimately raising the temperature of combustion and the coolant temp.

Where is the low coolant message on a Duramax?

During PDI, coolant should be added to fill the upper chamber of the radiator surge tank. (Fig. 6) A coolant level that is low enough to turn on the Low Coolant message will be below the horizontal line across the radiator surge tank. (Fig.

What happens when coolant goes out in a GM Truck?

Still trying to find the answer but have recently found an article illustrating the problem. If your General Motors SUV or truck is losing coolant, with no visible signs of a leak, the source may shock you Worse, allowing the problem to go on often results in a new engine.

Is the coolant level on my Silverado Sierra low?

A Low Coolant message may be displayed on the Driver Information Center of some 2017-2018 Silverado and Sierra models equipped with the 6.6L Duramax diesel engine (RPO L5P). An inspection of the radiator surge tank may appear to show a low coolant condition.

How many quarts are in a Duramax cooling system?

Duramax cooling system capacity is actually 24.7 quarts, so he was closer than you think. But when doing a cooling system “flush” you are actually exchanging the coolant, typically with a machine that puts new coolant (already mixed 50/50) into the system as the old is leaving.

LLY Duramax trucks don’t suffer from the same injector failure problems that LB7 trucks frequently had. Instead, many LLY Duramax problems stem from overheating. A new variable vane turbocharger and an EGR system were also added. Check out our LLY Duramax Specifications chart below for detailed information!

What is the tow capacity of a LLY Duramax?

LLY Duramax Tow Capacity The LLY Duramax was sold from 2004-2006 and tow capacity varies between model years. Conventional tow capacity across all models is 12,000 lbs. 5th Wheel tow capacity varies between years and depends on cab configuration. Numbers generally fall between 15,000 lbs and 16,700 lbs though.

How many horsepower does a GM LLY have?

It was a stepping stone for GM as they begun to encounter stricter emissions requirements thanks to the federal government and California. Despite the added emissions, the LLY was very powerful and capable for the time producing 310 horsepower and 605 lb/ft of torque. It was mated to a 5-speed Allison Transmission in years 2004 and 2005.

What kind of car is GMC Sierra 2500HD?

Description: Used 2004 GMC Sierra 2500HD SLE with AWD/4WD, Audio and cruise controls on steering wheel, 6ft Bed, Power Driver Seat, Electronic Folding Mirrors. Great Deal! Accident History: This vehicle has 0 reported accidents. Number of Previous Owners: This vehicle has multiple reported owners. Usage Type: This vehicle was used by an individual.

Is the Chevy Silverado 2500HD a Duramax part?

This 2005 Chevy Silverado 2500HD built by Steve L performs just as good as it looks. Sitting on 35’s with 20×10’s and a 6″ lift, this LLY Duramax features an MBRP Exhaust, EFI Live custom tuning, PPE gauges, ARP head studs and more! It isnt too often you can have the best of both worlds but for Jason W. its his reality.

Where was the 2004 GMC Sierra 2500HD last serviced?

Mileage: 184,831 miles Body Type: Pickup Color: Beige Engine: 8 Cyl 6.0 L Accident reported. Purchased on 08/28/04 and owned in MO until 05/14/21. Driven an estimated 14,222 miles/year. Last serviced at 237,923 miles in Aurora, MO on 04/30/21 • Vehicle serviced • Antifreeze/coolant flushed/changed.

What kind of tires does a Duramax GMC 2500HD have?

This LLY Duramax sits with a sleek, street performance stance and has all the mods to back it. It isnt too often you can have the best of both worlds but for Jason W. its his reality. Jason built matching 2005 GMC 2500HD Pickups in both lifted and in street trim. This highly modified LLY Duramax sits on 38×15.5 tires courtesy of a 9.5 lift.

When did the first Duramax V8 engine come out?

Duramax Engine LB7 2001 to 2004 The first Duramax V8 was introduced in 2001 and was given the code name LB7. The introduction of common rail injection powered by the Bosch CP3 injection pump made the LB7 Duramax stand apart from other diesels of the day with excellent power and efficiency.

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