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.
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.
Why does my Duramax water pump keep breaking?
On the Duramax LBZ water pump the impeller is made of plastic. This is actually very common on a lot of engines and is usually the #1 reason water pumps break. Over time the impeller is subject to a lot of normal wear and tear and high temperatures. For no fault other than the plastic, the impeller wears down and eventually fails.
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.
Why does my Duramax turn over but wont start?
Turns over but wont start. The fuel filter primer loses pressure after priming it. The only code showing up is a number three glow plug, but that code has shown up on and off for a while, and shouldn’t make it impossible to start. Clicking this will make more experts see the question and we will remind you when it gets answered.
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 happens when I put my Duramax in limp mode?
While in limp mode, the transmission will lock in 3rd gear, the torque converter will remain unlocked, and the transmission will not be able to operate in reverse. It’s great to have such a fail safe, but in many instances the limp mode is activated when it’s not entirely necessary.
Why are the Pistons on my Duramax not working?
Low-quality castings from its suppliers and a reduced amount of meat present in the wrist pin area (thanks to the use of wrist pin bushings) are to blame for factory piston failure. In most cases, the cast-aluminum piston cracks along the center line of the wrist pin, as shown above.
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.
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 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.
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 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.
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 kind of engine does a 2005 GMC 2500HD have?
While we tend to focus on the 2500HD/3500 models, you’ll find the powertrain specs here for the gasoline engine equipped light-duty/heavy-duty pickup trucks as well as those powered by the Duramax 6600 diesel. The above photos of the 2005 GMC & Chevy have been available for some time here in The Diesel Page.
What are the problems with the Duramax 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.
What kind of compression ratio does a Duramax have?
Thanks to a 17.5:1 compression ratio (the highest of any other engines in the Duramax lineage), extreme amounts of low-rpm cylinder pressure (i.e. torque) can be present when you’ve more than doubled the factory horsepower and torque rating.
How can I Keep my Duramax Diesel pump healthy?
However, there are measures you can take to keep the pump happy and healthy, the first being to always buy your diesel from a high-traffic, reputable filling station that’s known to dispense good, clean fuel. Second, always change the fuel filter at or before the recommended service interval.
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 is the roller lifter on my Duramax not working?
Unfortunately, the latter scenario plays out more often than seizures do. Typically, the roller lifter (or bucket) that rides on the CP4.2’s shaft (the part that’s driven up and down via the plunger) fails due to lack of lubrication or debris hampering its ability to operate in an unobstructed manner.
Why does my transmission make a humming noise?
Thanks for your question about the humming noise in your transmission. Humming noises are usually an indication of a bad bearing. If you are sure the noise is coming from your gear box and happens even in neutral, then the output shaft bearing in your transmission may be starting to go bad.
Why is my Duramax not shifting out of 2nd gear?
Hey guy my name is john I have a 2001 2500hd duramax and it seems to me it’s not shifting out of either second or 3rd and the shift indicator lights work perfect but staying stuck in either 2 nd or 3rd gear any help would be so greatly appreciated 04LLYDMAX…. Did you ever figure out your problem?
What to do about a Duramax 6.6 LB7 engine?
If you are having a problem with your 2001-2004 Duramax 6.6 LB7 diesel engine, please feel free to give us a call. We carry a full line of repair and performance parts for these engines that we install in our shop on a regular basis. Odds are we have run across your problem before and would be glad to help. Call us at 1-877-367-9351.
Are there any issues with the Duramax pickup?
This can produce long cranks and hard starts. Glow Plug System Issues – Nearly half of the check engine lights that come in for the Duramax pickups are for glow plugs. The glow plugs burn out over time and can be a real nuisance to remove from the aluminum heads sometimes.
What kind of transmission does the LB7 Duramax have?
Allison Transmission – The Allison transmission behind the LB7 Duramax to be honest is nothing to brag about in stock form. If you add a programmer that adds 100 horsepower or more, you will be able to limp the transmission.
Are there any issues with the Duramax check engine lights?
Glow Plug System Issues – Nearly half of the check engine lights that come in for the Duramax pickups are for glow plugs. The glow plugs burn out over time and can be a real nuisance to remove from the aluminum heads sometimes.
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.
When does a Duramax chev.p.u.lose power?
Duramax Chev. P.U. (2003) loses fuel prime and motor stops running at low RPM or at an idle. No visible leak around filter area. Fuel pressure … read more Vocational, Technical or Tra… Hi, I just purchased a 2004 Kodiak C4500 crewcab with the Duramax diesel engine mated to an Allison with 4:44 gear ratio. What rpm do you … read more
Why does my Duramax not run over 30 mph?
Took it to dealership because of a surge at idle, and at 55 to 60 mph. Dealership replaced fuel pressure regulator. $900.00 dollars later and a half mile down … read more I have a 2003 Chevy 4500. New injectors, new fuel filter. Will not run over 30 mph. Could it be a lift pump?
Glow Plug System Issues – Nearly half of the check engine lights that come in for the Duramax pickups are for glow plugs. The glow plugs burn out over time and can be a real nuisance to remove from the aluminum heads sometimes.
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.
Do you need to remove the cab on a 2005 Chevy 2500?
I visited the shop of a friend of mine who I work with who was in the process of replacing the heads and injectors on a 2005 Chevy 2500 4X4 with a Duramax diesel engine. I’ve always heard you need to remove the cab to do any kind of major engine work so it was interesting to see what was involved with removing the complete cab assembly.
However, there are measures you can take to keep the pump happy and healthy, the first being to always buy your diesel from a high-traffic, reputable filling station that’s known to dispense good, clean fuel. Second, always change the fuel filter at or before the recommended service interval.
What’s the problem with a Duramax 2500HD 5th Wheel?
The problem with 3/4 tons and 5th wheels is their lack of ability to carry the pin weight and remain within specs. Check the Tire and Information Loading sticker on the left rear door pillar…it will list the cargo capacity for that vehicle. Pin weight is an issue, no doubt, even on the 3500 HD. Click to expand…
What is the towing capacity of a Duramax 2500HD?
As a matter of fact, there is NO mention of the gross vehicle weight in the entire diesel supplemental manual. Subtracting the listed towing capacity (13,600) from the GCWR (22000) gives an odd number of 8400 lbs which corresponds to nothing.
Are there any problems with the LLY Duramax?
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!
Is the Duramax 3500 SRW the same as the 2500?
Despite what is written between the gas and diesel books, the DRW 3500 has significant bit more spring in the rear from the 3500 SRW and 2500. …so the trailer just “swung out to the right” all by itself, for no reason and with no provocation ?
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.
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.
Why does my truck run rough after a cold start?
Doesn’t really sound like fuel gelling as I don’t think it’s that cold, and she always starts strong and quick, it’s just like 10-20seconds after start, it will run rough like it’s running out of fuel, then die. Again, only about 3 or so times it’s done this. PMD is Heath, and this issue is only on certain cold starts, never hot.
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’s the Check Engine light on a Duramax?
Started up fine. Only thing i noticed was that the oil pressure was pegged out at 120 and the battery was around 10 or 11 marker on the gauge. Ran and drove fine. Keep in mind the temp was around 18F this morning when i left for work. You will need a scanner to pull the codes.
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.
What happens if the crankshaft on a Duramax goes bad?
Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. 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.
What causes the injector on a Duramax to fail?
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. The solenoid style Bosch units found in the LB7 employed a non-hardened internal ball seat to seal the injector.
What should the idle knock sound be on a Duramax Diesel?
The sound is often more pronounced in the interior of the truck as it’s amplified by the transmission bell housing. Idle the engine at about 600 RPM with the transmission in Park or Neutral. The engine oil temperature should be 113–185°F (45–85°C). Turn the HVAC fan and radio off. Remove the accessory drive auxiliary belt.
What to do if your Duramax won’t start?
If the fuse is o.k. if you have a test light or multi meter test the terminals the fuse plugs into,there should be two terminals in the fuse box.Test for power on one of these terminals while someone is trying to start the vehicle.If you have power then the start circuit is good and the fault is in the starter itself.
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. The solenoid style Bosch units found in the LB7 employed a non-hardened internal ball seat to seal the injector.
When to start a GMC Duramax diesel engine?
Remote start and a little time letting the Elevated Idle function do it’s thing before driving the truck goes a long way to warming the oil enough start the pressure drop process. I don’t like to work any engine until it has warmed enough for the oil to at least start to crop, and for the coolant temp to start to rise.
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?
Why does my GMC Duramax have high oil pressure?
High oil pressure at cold weather start up is normal for these engines. Remote start and a little time letting the Elevated Idle function do it’s thing before driving the truck goes a long way to warming the oil enough start the pressure drop process.
Low-quality castings from its suppliers and a reduced amount of meat present in the wrist pin area (thanks to the use of wrist pin bushings) are to blame for factory piston failure. In most cases, the cast-aluminum piston cracks along the center line of the wrist pin, as shown above.
What to do if your Duramax crankshaft is weak?
The ultimate fix for the weak factory crankshaft is to replace it with a stronger unit that’s been internally balanced. The billet Callies crankshaft available through Wagler Competition Products is machined from triple heat treated 4330V steel and features reduced rod journal widths for improved strength (which calls for narrower rods).
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.
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.
What happens when you put your car in limp mode?
The limp mode does often reduce the power and limit the RPM of the engine so you can drive your car to a workshop without damaging the engine. For example, Your engine control unit is detecting that your turbo boost pressure is 2.0 bar when the maximum boost pressure should be 1.3 bar. Overboost may damage your pistons or other internal parts fast.
What to do if your transmission is in limp mode?
Make sure that you are somewhere safe. Make sure that the engine has been off for at least 5-10 minutes. This will give the engine computer a few moments to sort anything out. Go ahead and verify that the transmission is still in Limp Mode. Sometimes time provides the fix.
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.
When does a GMC Truck shut off when in gear?
Chevrolet- GMC Truck Shuts Off When In Gear. After the motor heats up when i put the truck in drive. It also shut off when i put in reverse. The Chevy truck stalls . Sometimes the truck shuts off but mostly when i put the Chevrolet in drive it shuts off.sometimes it shuts off when i put the truck in gear. GMC Truck Shuts Off When In Gear.
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.
When did GMC Duramax lose power under load?
In 2012 there was a P1093 code and the dealer invoice states “…low rail pressure during enrichment. Command high fuel rail pressure, pressure drops. Follow diagnostic chart, test system pressure, relief valve failed” so they replaced the FPRV.
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.
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.
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.
Are there any major problems with the L5P duramax?
Mechanically, the L5P Duramax is stout and very few major problems have been reported. One common problem is with the MAP sensor however, as it tends to clog with soot and throw a check engine light, but a simple MAP sensor spacer and a can of electrical cleaner can get you back on the road worry free and prevent the soot from building up again.
What are the diagnostic parameters of a Duramax diesel engine?
2005 6.6L (LLY) Duramax Diesel ENGINE DIAGNOSTIC PARAMETERS SENSED PARAMETER FAULT CODE ACCEPTABLE OPERATING RANGE AND RATIONALITY PRIMARY MALFUNCTION DETECTION PARAMETERS SECONDARY MONITORING PARAMETERS AND CONDITIONS MONITORING TIME LENGTH AND FREQUENCY OF CHECK MONITORING METHOD FAULT CODE STORAGE AND MIL ILLUMINATION
Where was the 2005 GMC Sierra 2500HD last serviced?
Mileage: 85,773 miles Body Type: Pickup Color: White Engine: 8 Cyl 6.0 L No accident or damage reported to CARFAX. Purchased on 01/11/05 and owned in PA until 03/29/21. Driven an estimated 11,298 miles/year. Last serviced at 183,665 miles in Johnstown, PA on 06/09/21 • Vehicle serviced.
How many KMS does a Silverado Duramax get?
There is about 105000 kms or 65000miles. The black smoke is gone now, just left with a lack of power and crappy fuel economy. I talked to a guy last night that has the same truck, but an 07 and he gets about 650kms to a talk, I get 300kms! I’ll see if I can get one of those filters locally.
How many miles does a GMC Sierra 2500HD drive?
1st owner drove an estimated 35,674 miles/year • 2nd owner drove an estimated 0 miles/year • 3rd owner drove an estimated 0 miles/year • 4th owner drove an estimated 0 miles/year • 5th owner drove an estimated 9,651 miles/year • 6th owner drove an estimated 0 miles/year.
What kind of fuel does a Silverado Duramax use?
As for fuel I have always filled up at Sunoco with their Gold diesel. The previous owner did the same. I always run the tank to empty before refilling it. I get about 300-350kms to a tank.
What causes the crankshaft on a Duramax to crack?
Or how about the fact that the rods in the LB7 and LLY engines can bend with added power and the LBZ and LMM mills are notorious for cracking pistons? Discover the worst failure point (s) of your Duramax in the article that follows, along with how to address it. 1. Snapped Crankshaft