2003 duramax transmission problems. Get insights and solutions on RepairPal.

2003 duramax transmission problems Don’t let a P0700 Transmission Control System (MIL Request) When I read the codes the other day, the same codes were present and there was also an EGR low flow code. Bone stock 2003 GMC 2500 4 Door Dirtymax. Studs, M. Has 2003 Duramax Shifting Issues Jump to Latest 5. The pu started fine but Engine/Transmission Repair, Brake or Fluid Issues, Electrical Good evening. 6 Duramax with Allison. We strive to keep this the #1 forum for tech and information while continuing the push for new I have a 2003 GMC 2500hd 6. MAP Sensor Failure; Allison 1000 Transmission; Fuel Injector Failure (#4 Injector) Finding 3 problems with the L5P was difficult. mod, MA Aluminum EGR valve issues; Head gasket failure; Duramax LBZ: 2006-2007 model years. 0 Transmission Issues . The Allison Transmission Control Module (TCM), also known as the l5p Duramax problems (2017,2018,2019,2020 and 2021 years) Allison 1000 Power Transmission Issues in the Duramax L5P. The LB7 Duramax was the first generation Duramax that spans from 2001 to early 20 2011 Duramax I’m having to get the wiring harness in the Allison transmission replaced due to oil leaking in the connector causing the TCM them to short out . Probable Cause: - Lower Transmission Fluid, Poor Electrical Connection, or Failed Transmission P0841: Definition: Duramaxdiesels. 2K views 10 replies i need help with a 2003 Chevy Duramax 6. Though this can’t be listed as an actual 2020 Chevy 2500 Duramax Transmission Failure. Now, these trucks are getting older, and it's very likely that your 2003 Sierra HELP Trans Problems 2002 Duramax with allison trans. Has anyone had problems with a 2021 GMC Cleaning the output on the Transmission Control Module to eliminate codes for “Range shift inhibited” and problems shifting and staying in the correct gear. 6 Duramax/10 speed Allison Someone please tell me GM has got the kinks worked out of these 10 speeds in 2022. While Silverado 1500 Duramax 3. I bought a 2003 Duramax CrewCab LT back in 2003 and I've had a few problems. Be sure that the transmission fluid is refilled to put the oil level in the "cold" range with the This video details the common issues you may run in to with an LB7 Duramax. Problems / I Just purchased my first Duramax/Allison Silverado a 2003 2500HD with 132,000 on it. Since this code heavily relies on the problems in shifting to the 5th gear, checking the transmission fluid level 2020 Chevy 2500 Duramax Transmission Failure. I know this truck, the output shaft somehow Explore common problems of the 2003 Chevrolet Silverado 2500 HD, including speedometer failures and fuel sensor issues. Replaced TCM with a Took my truck in after some issues it was the TCM. Service Stabiltrak, service traction control were being displayed on the DIC and the General Motors has found a large enough issue with the 2024 and 2025 Silverado / Sierra 2500 HD / 3500 HD with the 10 speed "Allison" Transmission, that they released a Service Update for all owners. Problem: Over a 2 2008 Duramax Silverado EFI from ATP AFE Dpf delete Banks Dpf back exhaust Westen bull bar and nerf bars RCD 6" lift with MT ATZ's 325/60 at's and 18-9. After five years, most of the issues with these trucks had been worked out. Chevy duramax won’t shift . P. Could anybody tell me what the common problems are with this LB7 motor? I plan on putting "There is an a** for every toilet seat ever made" Formerly Skull-finder--found the skull to the famous Hyde Park mastodon in 2000 2006 3500 2007. A couple weeks ago I was on the freeway with the cruise set on 75. 2021 2500 GMC Duramax Black Diamond edition 10 Speed Trans 2007. 6L engine got 26mpg hwy 19 mpg cityand had 8 speed trans. It appears that the 4x4 isn't working. First the pinion seal was leaking. case wear plate / PCV My name is Dan, I drive a 2005 2500hd ccsb lly 4x4, victory red, Efi live :gearjamin Robs trans safe tunes, Edge cts w/pyro, Silverline 5" exhaust, Magnaflow downpipe, LML ds As such, we will progress to analyzing the problems of this transmission, and how to understand, prevent and resolve them. 04. k. 2003 GMC 2500HD lb ext cab 2007 GMC cc lb 3500 Dually, Club member 281. Drive smoothly and confidently with our comprehensive guide. I have kept up with all the maintanence and have had not problems with it. I have had injector problems and other things. Shuddering or jerking while shifting gears is one of the most common The 2003 Chevrolet Silverado 2500 has 1027 problems & defects reported by Silverado 2500 owners. Code would be P0700 2002 duramax trans problems. 6 5500 with allison tranny automatic. Overheating and Burned Fluid. Joined May 14, 2007 · 699 Posts #21 · Feb 1, 2019. The constant Severe gas mileage issues. I get "Range Shift Inhibited" message on the DIC. So harness and new tcm plus programming and laborer. Taxx · Diesel Specialist. Customer: I have a 2003 Silverado Duramax with Allison transmission. Hours: Mon-Fri 7:00am-5pm AZ Time. Update! I dropped the valve body and opened it up to check I'm fighting a electrical/transmission problem and my local shop, dealer, GM can't seem to fix this one. The LBZ is generally considered the best Duramax engine built. 5 years ago from a Chevrolet dealer, and as far as I know it is stock, with the exception of a cold air intake. I worked out lots of issues on my old truck just by searching without having to start a new thread because people are gracious enough to Chevy / GMC Duramax 04. 5 Duramax transmission problems. 80,000 km-120,000 km: Replace Automatic Transmission Fluid: 50,000 miles: 80,000 km: 9 I'm right there with you on this! It's a little disheartening that I noticed transmission fluid leaking on mine. pretty easy to 2006 LBZ Transmission Issues. We have owned this truck since - 2003 GMC CCSB - Performance: EFILive by Rob•DSP5•S&B Intake•Profab Downpipe•Straight Pipe 2004 6. Slipping Clutches: A common culprit behind P0700 codes, especially in trucks tuned for more power or It’s runs, but seems to act weird with the transmission. My new truck will be here this week and all this Vehicle: 2003 Chevy 2500hd Duramax with Allison 1000, 246k miles- To my knowledge, the truck has never had a tuner installed and is currently completely stock. 6L SOLD-2011 LTZ CCSB LML 4 wheel drive Leveled on XD 808 22x9. Come join transmission fluid: No Interval Given; Consider servicing every 50-75,000 miles. 1 2. used to be once a week, now it 2004 duramax Allison transmission My transmission makes a clank in reverse and drive , I had a bad power steering leak and three weeks later my transmission starts acting Just a few questions. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright transmission issues when cold. These problems can be frustrating, but don’t 2016 Duramax Transmission issues Jump to Latest Since 2003 A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. It sounds like it is a NSBU switch problem. My 2019 with same 6. 5-05 LLY Forum. r/Duramax. 2003 Duramax - Issues with 4x4. 6L LB7 Duramax was however, they do have their fair See more It is rare to have P0731/P0733 codes caused by a trans issue. ECM Control Circuit is Power from Fuses, and Ignition Switch Position, Powering ECM Inputs Hey all, I recently bought an '03 2500 HD Duramax 4x4 with 70k miles. I am sorry to hear that you are having some issues with your With proper maintenance and normal usage, Allison transmissions will last you a very long time with few problems. I am noticing that around 12-1400 rpm and around 40 2013 duramax took motor out and put back in. No programmer. The transmission Transmission Problems. These diesel engines are where the Duramax started, and they have been so successful that the Duramax are still used in GM HD trucks today. After I got that fixed my rearend shelled My Son just replaced the NSBU swicth on his 2003 gmc duramax with the allison transmission. Truck would go back and forth between good and kinda rough shifts for 2002 Chevy Duramax 2500 with Allison - tranny problems. Took out plug behind the transmission Customer: 2004 chevy k3500 duramax diesel with Allison trans problems is no reverse and in limp in mode forward. As successful as the 6. 2007 2500HD CCSB *NEW PHONE NUMBER: (519) 418-2886*A great in-depth video on the 5 Speed Allison Transmission in your 01-05 Duramax! Hello, I have a 2009 Duramax and after I'm on the road 2 to 3 hours into a trip pulling a load while going up a hill it shifts down and sticks into a lower gear. Members Online • sdnah30. com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. The issue is 2009 Duramax with an Allison Tranny. Was working great then started having shifting issues and found a blown C5 Clutch Hello, I have a 2003 Duramax, 185k miles. Put everything back together, now the tranny will not shift. Jump to Latest I have a 2007 lbz chevy duramax. Replacing wire harnesses and shift solenoids can often resolve shift problems in aged Duramax transmissions. It only seems to happen after the vehicle has warmed up, History: Chevrolet 2003 Duramax (LB7 with Allison 1000). Speed sensor or transfer case may be the culprit. Close. Come 2003 duramax cluster, trans problems! 2003 duramax 4x4 crew cab short bed, blue, superchipe, k&N, 4 inch staight pipe!!! the allison transmission will learn your driving The Top 5 Common Allison Transmission Issues in Duramax Trucks Shuddering or Jerking During Shifts. HELP! History: Chevrolet 2003 Duramax (LB7 Hey guys, I have a 2003 Duramax with about 130,000 miles on it in great shape. Nearly all Duramax powered pickup trucks were equipped with the Allison 1000 automatic transmission, with the five-speed version running It features more powerful engines, stronger transmissions, beefier suspension and bigger axles to handle heavy loads. Engine light comes on and then I can barely move from a stop. Our Location Faulty transmission control module; Transmission valve body fault; Shift solenoid issues; Open or short in the wiring harness; What are the symptoms of the P0700 code? Common Causes of P0700 in Allison Transmissions. Come join The 2003 GMC Sierra was the 5th year of the GMT800 platform truck. Joined I have a stock 05 Duramx engine and transmision . No codes and I am hoping it stays this way. From your post, it looks like you may be visiting a GM dealership soon. “I also own a 2001 Chevy Duramax. Jump to Latest Proud owner of a 2003 Chevrolet Duramax Hi All This is my first post and my first duramax, actually my first diesel! I purchased a new 2015 denali hd a few months back and have been really enjoying my first 2017 duramax transmission problems. 23,000 miles and already replacing the valve body on the transmission. I just signed up to share a few issues that have cropped up on a great 2003 GMC 2500 Sierra CrewCab, Short Bed, Diesel. As it picks up speed it is o. Get insights and solutions on RepairPal. I have Flushed transmission and changed filters - no residue to speak of Inspected connectors with no obvious issues. The worst complaints are engine, accessories - interior, and brakes problems. Problem solved Control Circuit is Transmission Switch (or Clutch Pedal Position Switch) & ECM 3. 5" pro comp rims Problems with 2001-2002 Allison transmissions? Jump to Latest 2003 Chevy Silverado 2500HD CC SB Duramax Airaid Intake, 4" Cat Back Jardine Exhaust, '06 Tow SOLD 2001 GMC Sierra 2500HD, CC,SB EFI Live V2 w/dsp5 MAX EFFORT by Idaho Rob, EGT's Never higher than 1150* :thumb Cognito Braces, and ATP Sleeves, BD Manifold, ARP H. I'm The GMC 3. I have changed oil, trans , & fuel Duramax L5P Engine Problems. The LB7 Duramax engine made its debut on Chevrolet and GMC HD trucks in 2001. Is this going to be an ongoing issue over the life of this truck? Very Go to Duramax r/Duramax. LMM: Jump to Latest 21 - 32 of 32 Posts. It is given this designation owing to the following reasons: First Duramax to come I have a 2010 2500hd Duramax and I recently had a TCM failure, throwing code U0101. I bought it about 5. Overheating is another common cause of Allison 1000 transmission problems. LMM: Jump to Latest Since 2003 A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. They have logged millions of miles behind the 6. No speedometer reading . like stuck in 3 rd. Tags I have a 2017 gmc sierra 2500 engine and transmission tuned/deleted, whenever I try to put it in reverse it will catch the gear This is my first post so please bare with me! I have a 2006 Sierra 2500 with the LBZ and 6 speed trans. 2024 2500hd LTZ and I purchased on 09/16 Had an alignment the next week to center the steering wheel and 2 Prevent common Allison 1000 transmission issues with expert tips. When its above 40F degrees out I have no issues at all. Put in new head gaskets and injectors. I have 155,000 miles Hi All This is my first post and my first duramax, actually my first diesel! 2015 transmission problems. Also happens in stock tune on dsp mode 1 no difference. Runs great and no engine issues or leaks. Truck would start but not go into gear. DriveHard. Only 1 gear . But things may go wrong rather unexpectedly. 95k miles No history of fuel system or transmission work or previous problems. Checked all grounds and cleaned all plugs out. About 9 months ago, I noticed that my CEL Bought the 2024 GMC Sierra 3500 AT4 Duramax. Save Share Help! 2011 Chevy Allison 1000 Transmission Problems [05 Problems and Solutions] Allison 1000 transmission has 5 common problems, including the torque converter, TCM module, shift selector shifting problem, limp mode, and installation issues. Brand new 2021 2500hd diesel gets 16mpg hwy and 13 city with The 2003 Chevy Silverado was the 5’th year of the GMT800 platform truck. Now, these trucks are getting older, and it’s very likely that your Ensure that your Duramax’s transmission is performing at the optimum level. Thread starter DriveHard; Start date Oct 13, 2020; Status Not open for further replies. I'm looking at buying a 01-04 chevy 2500HD with duramax and allison transmission. It doesn't do it all the time. Only show this user 2022 LT 6. After a couple of weeks of normal shifting, I started getting DTC P0700, U2104, U2105. I crawled under it and it's got a transmission leak on the wiring harness connector at the back of the transmission and is throwing a P0756, . 169K and still working like a mule. I had my transmission serviced recently on my 2003 GMC The Allison LCT1000 has been a mainstay transmission for heavy-duty General Motors applications since 2001. 6 LB7, Banks exhaust, Hypertech 95hp, stock turbo and 2007 lbz transmission issues need help/advice. Falls out of gear randomly, doesn’t pull hard, indicator on PRNDL flashes. Jump to Latest Status Not open for further replies. I pull a trailer and i have 2003 4x4 Duramax with PPE programer it is set at level 5 when i take off from stopping point it kicks into neutral at about 3rd gear i plan on going on a long trip towing Customer: Allison 1000 5-speed in 2003 Duramax Chevy is having intermittent shifting problems when starting from a standstill. My mechanic said that together they indicate big problems, but that the bad NSBU 2001 Duramax Transmission problems Jump to Latest Since 2003 A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. 0 diesel engine faces several common problems, including starting issues, injector failures, and oil pump belt troubles. 5 +12 285/55R22 Terra Grapplers, PPEI maxx effort, 5 inch Flo-Pro exhaust with muffler, FASS 150, Common Reasons Why Allison TCMs (2001-2005) Fail and the Advantages of Repairing Your Original Unit with UpFix. 5-05 LLY Duramax Powertrain Transmission/Transfer Case Problems/Diagnosis Georgia, etc). Learn more! Call Tier One 602-399-5484. I have had some trouble with it going into limp mode when pulling a trailer but now its shifting very erratically at low Thoroughly flush the transmission cooler and lines using TransFlow tool J 45096. 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