Why does my GMC Duramax Diesel not start?
Truck was idleing for 10 minutes warming up. Shut off and restarted 45 min. later. Drove down the street and it died and would not restart. While trying to start, the Battery not Charging warning came on. Towed it home and changed fuel filter. Primed and would start but stall if not continually priming. Dealer replaced injectors 20,000 miles ago.
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.
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’s the VIN code for a Duramax 6.6 diesel?
Thank you GM for making it so easy to get to and change the oil. The 6.6L RPO LML (VIN code “8”) is the 2011–2016 version of the Isuzu/GM Duramax V8 diesel engine. It is a further advanced version of the LMM engine with the majority of the changes addressing a required drastic reduction in engine emissions.
What to do when your Duramax Diesel stops running?
Put the other end into the container and run the engine to fill that line. Then shut it off and remove the IGN 1 relay from beside the starter relay. empty out the container and keep the line full. Crank the engine for 15 seconds fully and measure the amount of fuel that comes out in CC or OZ.
What causes a GMC 2500 diesel to stop running?
My GMC 2500 6.6L Duramax Diesel stopped running and will not start. Turns over but sounds like it gets no fuel. Has happened in past and dealer fixed short in wire. That time it would blow fuse but not this time. Submitted: 10 years ago. Category: GM Experience: GM Grand Master Technician 2007. 14 years experience. Hello, I’m Cam.
Is there a way to reset the engine control module?
There are a few ways to reset your Engine control modules. One way is by disconnecting the battery cable for 2 to 3 minutes and waiting to see if the check engine light comes back on upon reconnecting the battery and start the car.
Where is the fuel line on a GMC 2500?
Find the 2 fuel lines on the rear drivers side valve cover. Take the smaller one off and attach your hose to the metal pipe coming from the engine. Put the other end into the container and run the engine to fill that line. Then shut it off and remove the IGN 1 relay from beside the starter relay. empty out the container and keep the line full.
How to fix 2003 Duramax Diesel loosing Prime?
2003 Duramax Diesel loosing prime and will not start until I lift the hood and pump the prime plunger on the fuel filter housing. Clicking this will make more experts see the question and we will remind you when it gets answered. You can’t post conmments that contain an email address.
What kind of pump does a 2003 Duramax use?
You can’t post conmments that contain an email address. 2003 duramax, when clod it will start drive for 30min to hour and shut it off will not start untill it cooled off for about 2-3 hours at the shop they replaced the fule pump with 2006 modle for $150,the pump for the 2003 was $650 is this right,is this the same pump??
What kind of diesel does a Sierra 2500HD have?
2001 2500HD Sierra w/6.6L Duramax diesel. Sometimes, not often, once a month or so my truck at start up won’t fire, just turns over. I have to go under the hood and pump up my diesel fuel system – located on the passenger side of the engine.
Truck was idleing for 10 minutes warming up. Shut off and restarted 45 min. later. Drove down the street and it died and would not restart. While trying to start, the Battery not Charging warning came on. Towed it home and changed fuel filter. Primed and would start but stall if not continually priming. Dealer replaced injectors 20,000 miles ago.
Why does my GMC Silverado have no crank?
This is a fix for a known electrical issue with the 2003-2007 C/K series GM Trucks where a bad ground causes multiple issues. Such as no start, no crank, intermittent no gauges, and sometimes the theft light would stay on, and the parking lights would stay on.
What to do if your Chevy Silverado won’t start?
Simple fix by checking the ground in the harness right behind the passenger side cylinder head. Trace the break and wire it to a new location for a ground such as the front of the cylinder head as I did. Loading…
When to take your GMC Duramax to the dealership?
It’s hard to pinpoint what the problem is without running more tests and the only way to run those tests is with the computer the dealership has. Just so you know your injectors are still under warranty until 100,000 miles. Most likely you will have to take it to the dealership to get you truck fixed.
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.
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.
How many miles does a GMC Sierra 2500HD drive?
1st owner drove an estimated 28,533 miles/year • 2nd owner drove an estimated 0 miles/year • 3rd owner drove an estimated 4,212 miles/year.
When was the GMC Sierra 2500HD last serviced?
1st owner purchased on 01/16/03 and owned in CT until 10/29/04 • 2nd owner purchased on 01/12/05 and owned in MD until 01/25/20. 1st owner drove an estimated 14,624 miles/year • 2nd owner drove an estimated 8,356 miles/year. Last serviced at 143,899 miles in Frederick, MD on 08/07/17 • Vehicle serviced • Tire (s) balanced • Tire (s) replaced.
How to relearn a procedure on a GMC after changing?
Without resyncing, the PCM cannot properly determine the position of the crankshaft. The proper procedure for resyncing or relearning the crankshaft position is called the “CKP Variation Learn.”
What happens to the crank sensor on a GMC?
The crankshaft sensor on GMC vehicles is synced to the powertrain control module, or PCM. When the crank sensor is replaced, it must be resynced to the PCM. Without resyncing, the PCM cannot properly determine the position of the crankshaft.
What to do if your GMC Truck wont start?
No relearn is necessary. In this situation, the vehicle will start and run with no problem. If the vehicle won’t start, check your scan tool for a VTD (Vehicle Theft Deterrent) Fail-Enable Mode trouble code, or if the security light on the dash is illuminated.
Why do I have to relearn the crank on my GMC Truck?
The reason for the relearn is for the missfire detection to be accurate. It is something that has to be done when useing a pcm that was not in your truck previously and had the case learn done on it. Even from the factory, each vehicle has to get this done to the computer/ motor it works with.
Without resyncing, the PCM cannot properly determine the position of the crankshaft. The proper procedure for resyncing or relearning the crankshaft position is called the “CKP Variation Learn.”
The crankshaft sensor on GMC vehicles is synced to the powertrain control module, or PCM. When the crank sensor is replaced, it must be resynced to the PCM. Without resyncing, the PCM cannot properly determine the position of the crankshaft.
Why is the head gasket on my LB7 not working?
This allows the layers of the gasket to separate which lets combustion pressure into the coolant system. The pressure will cause the coolant to be pushed out the coolant overflow. You can check for a head gasket issue by squeezing the top radiator hose when the engine is running and right after you shut it off.
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.
Is the water pump on the LB7 Duramax leaking?
Water Pumps – Another issue with the LB7 Duramax is the water pump leaking. This one is fairly common and unfortunately a huge pain in the butt to change. Water will seep from the underside of the pump. Be prepared though because you will have to remove the dampner pulley to get the pump off.
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 is the first year of the Duramax?
The LB7 Duramax was first introduced for the 2001 model year as General Motors retired its 6.5L Detroit diesel. In every possible way, the Duramax was superior to the outdated Detroit and marked a revolutionary turning point for GMC and Chevrolet pickups in the diesel marketplace.
The LB7 Duramax was first introduced for the 2001 model year as General Motors retired its 6.5L Detroit diesel. In every possible way, the Duramax was superior to the outdated Detroit and marked a revolutionary turning point for GMC and Chevrolet pickups in the diesel marketplace.
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 the GMC Duramax LB7 come out?
Duramax LB7 Specs & Info. The LB7 Duramax was first introduced for the 2001 model year as General Motors retired its 6.5L Detroit diesel. In every possible way, the Duramax was superior to the outdated Detroit and marked a revolutionary turning point for GMC and Chevrolet pickups in the diesel marketplace.
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.
How can I tell if my new injectors are bad?
The new injectors could be bad. If the oil level is not overfull then get a paper towel and touch the dip stick tip on the paper towel while oil is on the dip stick. If it’s only oil it will not spread. If it has diesel in the oil the oil with spread. If this test doesn’t show the injectors to be bad then you have three other possibilities.
Why does my GMC Sierra engine not start?
There are a lot of issues that can cause your Sierra to crank, but not start. The engine needs air, fuel, and a spark in order to run. It is highly likely that if the engine is cranking, but not starting that it has thrown an OBDII code.
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.
Why is LB7 injector failure a common problem?
We know today LB7 injector failure is a common problem, and because the operating tolerances inside the fuel system are so tight, proper lubrication from the diesel fuel is critical.
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.
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?