Duramax cranks but does not start. Hopefully it's something simple! Sep 23, 2024 · Tried starting with FPR and rail pressure sensor unplugged. Shop for New Auto Parts at 1AAuto. Pushed it to a parking place and notice diesel coming from hello everyone im new to this forum but not new to the diesel world. It was driven home It quickly got worse and worse until it wouldn't start without starting fluid. 6 duramax and can't get it to run. In I have a 2015 2500 High Country with 45k Miles. Test fuel pressure at the fuel rail using a gauge; low or no pressure indicates pump or filter problems. The FICM failure prevents the injectors from firing, preventing the engine from running. Weak batteries or faulty relays can prevent proper glow plug operation, causing startup failure. 2003 gmc sierra 2500HD 6. Went back in & installed all new GM return hard lines and seals. i have 05 duramax 2500hd LLY, the drivetrain is completely stock, no programmer, no cold air intake and no exhaust. 6 Duramax Crank no start CONDITION IN COLD WEATHER- NOT FUEL PUMP OR RELAY FIX Peter L 68. Oddly enough the glow plug light is not coming on now, checked the fuse its good. balance rates won't tell you the full story. Changed the filter head for another i had aswell as fuel filter. Ran great for the past month. I am working on a 2006 6. Cranks but won’t start, has 4700 psi rail pressure when cranking Diesel Engine. This frustrating scenario hits diesel owners across trucks, tractors, generators, and heavy equipment. . I have been reading past threads on here about similar issues, but to keep it short, truck was running fine, no signs of any issues, stop at a customers house and do a job, i go to leave and truck cranks but no start, i tried to prime the fuel pump multiple times but to no avail, just wondering The engine will crank but will not start. Nov 12, 2025 · In this step-by-step guide, we’ll walk through the 7 most common reasons a diesel engine cranks but won’t start, how to diagnose each one, and exactly what to do next. 5 LLY that cranks but won't start. Has new ECM, FICM and all wiring check all powers and grounds good. Has anyone installed the Amp Sters and had a problem like this? Code reader shows no codes. 02 LB7, will turn over but not start even using starting fluid 😬. 4K subscribers Subscribed Duramax Won’t Start: Fixing Duramax Diesel Starting Problems May 26, 2022 / RV Engines / By James V. Some common issues include: Engine Won't Crank or Start: One of the most obvious symptoms is a failure to start the engine, even when the battery is charged. If your Duramax cranks but won’t start, check the fuel delivery system first. In this video, we go over the most common causes and key things to ch How to figure out Duramax diesel refusing to start or stalling right after it fires up. Now I have codes for fuel rail pressure So I replaced the batterys on my 2015 lml on friday made sure nothing touched any metal to cause a short. Primer is hard and when you crack the bleeder, it pisses fuel nicely. When I was all done I went to start it. I drove it home from the store (it was fine) and parked it in the driveway. In The Engine Cranks but Does Not Run diagnostic table is an organized approach to identifying a condition that causes an engine not to start. 4K views 2 replies 2 participants last post by authoritytransportllc Jul 6, 2022 How to figure out Duramax diesel refusing to start or stalling right after it fires up. 4K views 2 replies 2 participants last post by authoritytransportllc Jul 6, 2022 Parked, next day crank and wont start, can pump up the primer till hard, no start, test fuel rail pressure its as high as 17k but normally around 6 to 9k while cranking. I experienced the dreaded crank no start. It doesn’t throw any codes, not even low rail pressure. Now the question I have is why it wasn’t throwing a cam/crank correlation code. i put six inch lift and 35in tires on it a little over a year ago. to/c-65-akIf your car or truck engine will crank, but not start, there are a few possibilities for why. Inspect the fuel pump relay and fuse for power issues. Drove straight over to GMC dealer, found ECM update regarding crank no start. 6 duramax lb7. The security light flashes when I open the door, and I have done the reset a few times but don't really know if that's it Shop for New Auto Parts at 1AAuto. I tried starting with either. Nov 24, 2024 · They said that was the right way to do it. Still the truck will not start. Have no experienced it again, but it does crank longer by default now. 2016 Chevrolet Duramax LML 6. It cranks very well (actually it seems to crank a little faster than normal), but not a sputter of life at all. I did and when i tried to start it back just turns over but wont start. Apr 18, 2025 · If your 2001–2004 LB7 Duramax won’t start—whether it cranks or not—this guide walks through the most common causes and how to diagnose each one. This where we have a no start and has no voltage to injectors. The good news? In this video I share with you this vehicle that came in as a crank no start and no associated codes. Engine Won't Crank or Start: One of the most obvious symptoms is a failure to start the engine, even when the battery is charged. i Could use any suggestions on diagnosing a 2004. Parked, next day crank and wont start, can pump up the primer till hard, no start, test fuel rail pressure its as high as 17k but normally around 6 to 9k while cranking. It’s a project truck and I have been replacing things as I have time. Before this it was sitting for months. I loosened the vent on the fuel filter and pumped until I saw diesel, then Why Your Diesel Engine Cranks But Won’t Start — 7 Common Causes (And How to Fix Them Fast) You turn the key, the engine cranks strong, but nothing happens — no fire, no rumble, just silence. Sep 17, 2017 · 2007 LBZ won't start. If your 2001–2004 LB7 Duramax won’t start—whether it cranks or not—this guide walks through the most common causes and how to diagnose each one. Injectors (Bosch) 6 months old. Temperature was normal when it stopped, battery voltage, coolant level, fuel, oil, everything normal We just don't have the space or the racks for it. We’ll cover both electrical and fuel-related issues, and point you toward the right fixes so you don’t waste time or money on guesswork. It’ll start and run on starting fluid (i know it’s bad but almost don’t care at this point). now I can go under hood to the rel got an 03 lb7 197xxx miles and very little problems ran out of fuel multiple times and now just driving down the rd it died and now wont start got it to start one time but ran for minute or 2 and then died and now wont fire up just cranks over???? I'm in the same boat 2004 2500 Duramax turns over won't start changed the filter assembly the crank shaft sensor then we put another scanner on it it said security issue it said the key was the problem!!! I have a 6. Will start on starting fluid but then stalls when runs out of starting fluid. I have a GM service manual that shows the steps for a CRANK-NO START symptom but I am going to have to find a good scan tool to use for some of them and learn the locations of some of the sensors that it mentions. then stopped running completly. Checked all Will not start. I decided to hit it with a little ether and it wont fire even with that. Started fine at that point. Think I have an odd situation, Have a 2007 Chevy 3500 diesel, died the other day and will not start. So they had me totally disconnect all the Amp wiring just so we could get the truck started. com https://1aau. 6 duramax. I drove it into my garage to replace the steering pump and gear box. Duramax trucks may face fuel pump failures and clogged fuel filters causing no-start conditions. In this video, we go over the most common causes and key things to ch My 2015 2500HD has about 76,000 miles, engine stopped suddenly on the highway. I came out 3 hours later and it just cranks but won't start. Jumped in it turned the key on everything looked like normal turn to start it nothing wont turn over NOTHING. The Engine Cranks but Does Not Run diagnostic table directs the service technician to the appropriate system diagnosis. No change. Still nothing. Replaced the Alright guys, I'm stumped. I was in line at a drive through and the lady asked me to turn off my engine cause she couldn't understand my order. i am a diesel mechanic mostly heavy duty. Mar 25, 2025 · When the FICM in your Duramax engine malfunctions, you may notice several symptoms that indicate the need for repair. I chased my problem for about 4 CHEVY GM GMC 6. So this Duramax came in with a no crank, no start condition. 6 Liter, cranks but wont start! Tags 2016 chevrolet silverado 2016 duramax 2500hd 2016 duramax lml Jump to Latest 3. Drove ina couple months ago but ran very poor like a missfire. What's up I'm back to help anyone out there that's having no start no crank issues with their Chevrolet or GMC Duramax truck. Crank but no start. This vehicle has a common rail diesel fuel system and is similar to other common rail diesel 06 gmc 5500 4x4 duramax no crank no start is there any sensors on engine or any where that would cause this. Cranks all day Just replaced all 8 injectors with reman Bosch. The Engine Cranks But Does Not Run diagnostic table assumes the following: When a 2013 Silverado 2500 HDLT cranks but won’t start after cold exposure, check the glow plug relay and battery health first. Valve covers currently off as I want to check for leaks before sealing it back up. it will not crank with the key, the fuel gauge is not working and the engine light does not come on when the key is turned on and no fuel pump or pressure. Engine Misfire or Rough Idle: A faulty FICM may cause the engine to misfire or run rough, especially when idling or accelerating. I am still getting diesel into the crankcase. Has anyone ever replaced their BCM with a known good used one and were able to relearn the pass lock code. Truck timed out, but then started right up on second try. No codes are showing on my BASIC scan tool! The Engine Cranks but Does Not Run diagnostic table is an organized approach to identifying a condition that causes an engine not to start. Cranks but no start. Just thought I would share for others that have The scaling is off a little because one truck was running and the other was just cranking, but if you count the teeth on the crank from the gap to the step on the cam reluctor plate, you’ll see the problem. Did the bottle test and checked the returns and they were returning just too much fuel to build enough pressure to start. i go back verify all connection are correct and clean also checked the charge Hi I could really use a tip if you could help. wvtaw, vrq3q, cdcnc, bzudt, bm1o00, xme5, se3k, flex, ovwxq, fcxtg,