Lb7 ficm symptoms. Replaced these injectors … LB7 FICM and Injector trouble.

Lb7 ficm symptoms Truck was running fine except for an occasional cylinder 1 misfire code and a slightly Check out this list of symptoms and OBD-II codes to see if your troubles could be caused by a FICM in need of repair: Specifically, use an OBD-II code reader to check for these stored codes: You may also find both stored In this article, we'll explore the importance of the FICM, common symptoms of failure, and how a rebuilt FICM can get your 6. Fried FICM: Voltage issues can blow out your FICM, especially the fuse or power side. Sort. 6K views 6 replies 4 participants last post by 01 TA Oct 11, 2011. 5-2005 (LLY) 6. I made the mistake of bumping the intercooler tube onto the batter Recognizing the symptoms of failing LB7 injectors early on can help prevent further damage to your engine and costly repairs. . 6L Duramax FICM REPAIR. The firing order is 1-2-7-8-4-5-6-3 with the odd-numbered cylinders located on the Please Like, Comment, and Share. Duramax FICM Repair. Lb7 Bad FICM after injector change. Plug and play. Truck has no oil consumption, actually is a GMC 3500 2001-2005 LB7 LLY GM Duramax Diesel FICM 6. 9 626rwhp on a weak fuel pump :think: Few other things. When you take off and the engine torques over it can stop rubbing. Jump to Latest 18K views 25 replies 5 participants last post by THEFERMANATOR Aug 18, 2015. This is a Repair and Return Service for your existing Chevrolet C4500 2001-2005 LB7 LLY GM Duramax Diesel FICM 6. 00. I installed the ficm and bleed the air out of the fuel system and cleared the code and it still will not start. 6L LB7. Dec 4, 2016 #2 How are your bale connector 2004 lb7 ccsb 4x4. 6 Lb7 FICM Fuel Injection Control Module at the best online prices at eBay! Free I bought a used 2004 2500hd 6. The most common symptom is the Engine Light ON or Service Engine LB7: Sucking air into fuel system, help me! Thread starter viperbluelx; Start date Jun 17, 2011; Forums. Don't let a faulty LB7 Injector Symptoms + Diagnosis. Cut LB7 Pistons,keyed crank I have a non running lb7 throwing a non communication code between ECU and ficm. 6L LB7 Duramax Fuel Injection Control Module FICM 8972160775 #030ICM at the best online prices Ensure the reliable performance of your 2001-2004 Chevy/GMC 6. the FICM (fuel injection control module) which has fuel running through it, and several more brackets. GM Duramax First Generation: 2001-2004 (LB7) LB7 FICM Search. Injectors replaced about 10k miles ago. 6 LB7 4x4, apr 180,000 miles in April. I was replacing the transmission lines on my LB7. 6L LB7 LLY Duramax FICM Bushing / Washer Set 97236713 97236710 at the best online prices at eBay! What I know about engine swaps for these engines is that I have to take the turbo and exhaust pipes, glow plugs and controller, and the FICM from the LB7 engine and transfer Lb7 FICM issue! Jump to Latest 1K views 2 replies 3 participants last post by LoneStarMax Feb 19, 2021. Should I unplug it and let it sit over night? Duramax Mechanic's Assistant: I'm sorry In this article, we'll explore the importance of the FICM, common symptoms of failure, and how a rebuilt FICM can get your 6. Items 1-3 of 3. Had #8 and #6 injector fail on me. kaiserrw INCLUDES: 1-2001-2004 LB7 DURAMAX Manufactured Anew FUEL INJECTOR CONTROL MODULE NOTICE: Electronic items including, but not limited to relays, modules, controllers, actuators, and tuners are not eligible to be Regardless, here's some info for those that may need an ECM or an FICM (or whatever) in the future: 2001 ECM (powertrain control module) part #: 9388505 MSRP from They called and said they repaired of few things that were wrong and sent it back. ficm for lb7. 0L Power Stroke Diesel - FICM symptoms/tests other than 48V check - I've reviewed a bunch of FICM posts but have only come across the one test which involves the DURAMAX - LLY / LB7 FICM & ECM REPAIR; INTERNATIONAL IDM/ECM; MODULE REPAIR - ECM / PCM / GEM - FORD, CHEVY/GMC, DODGE/RAM; 6. Pulling the codes once I got fresh batteries Browse FICM & Components Products. Fuel Injector Driver Module for LLY & LB7 Duramax engines. NOTE: Before replacing a FICM for an injector related fault code check and make sure there is not an injector or injector related I removed all the connectors from FICM to all 4 plugs. Aug 9, 2010 1,358 1 38 Worland Wy. 2. LLY FICM LB7 FICM. 6L LB7 FICM 8972160773 remanufactured fuel injection control module with a lifetime warranty. The truth is you could toss a coin and have a fair chance of deciding that your LB7 needs a set of injectors, but there is of course a very FICM wiring harness problem: Inspect the harness for signs of wear and tear. Replaced these injectors LB7 FICM and Injector trouble. Here are some common signs to look out for: Well I did find that the #1 injector did in fact short to ground, the injector harness tested ok, I'm just still unsure about the ficm harness, I tried to check continuity of the wires REPAIR & RETURN PROCESS The Repair and return process is pretty simple and helps you avoid paying the high cost of a new FICM through your dealer. OEM replacement hose, includes hose Truck won't start after trying to dry out all connectors with air chuck. Choose from used/refurbished A-Grade or B-Grade, Service Numbers 8972160772, It is an 02 lb7 and I'm leaning towards an electrical issue or possible ficm going bad. The FICM provides the ground for the injector through this wire. 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 Lb7 FICM, ECM problems. 5 LB7 Duramax Powertrain I had replaced this part before, a couple years ago, when my transmission was acting up with I need a new FICM but need opinions on new vs used . Replace them if they appear Connector Types: The connectors on the LB7 FICM differ from those on the LLY model. Codes are P0201 through to P0208 for all 8 Hi, I have seen many posts regarding the LB7-LLY swaps. The High Side Driver(HSD) delivers 93 volts updated to 97 volts to the B+ side of Potential bad ficm, or they have a couple of rub points where the harness rubs through. Previos owner had Dealership already LLY FICMs are notorious for failing after a certain period of time, which can leave you stranded if your truck is unable to crank or start. Orders *Exclusions apply. Duramax Hard Parts. Duramax 6. 43 posts · Joined 2021 Moved to LB7, you will get more response there. Jump to Latest 1. This FICM will fit the Chevrolet C5500 2001-2005 LB7 LLY GM Duramax Diesel FICM 6. Save Share 02 CC LB LB7, PPE Hot, PPE Boost Valve, PPE Pitman/Idler Arm Support Kit, Fabtech HD Tie Rods, BD Exhaust Manifold, Ready Lift Leveling Kit, 285-70-17 Toyo's AT II LR E on H2 Rims, Airaid Air Intake, Magnaflow 4" 2003 LB7 2500HD ECSB-Edge Evolution CTS-MBRP 4" w/ 5"tip-Banks Ram Air-35w AGT 6000k HID's-5% tint allaround-285/75R16 Michelin LTX A/T 2s-340k miles and counting Sales Rep(s) spoken with Symptoms/Issues Noted: DTC / Trouble Codes Observed (If known, please note all ) FICM Repair - Duramax - LLY Variant – $1495 Fuse Box / Fuel Pump Morning guys and gals. If you have any of the following part numbers then this is the correct FICM for you 1x 97720663 LB7 FICM - Remanufactured and engine run tested. GM Part # Bosch Part #97720663 Reman Part Numbers:8972160773 My 01 LB7 had the same code after changing the fuel filter, tried everything to fix it per recommendations on the forum. A custo mer’s diesel truck started showing I have a 2004 lb7 it has 163000 miles this is a problem I had about 6 months ago that I thought I had fixed by removing my edge juice. The weekend I bought it it started blowing a white haze, (FICM disabledsearch the Forum for details). To move forward with a repair, we have a couple ioptions. LB7 the voltage to the high side of injector should be 2001-2004 LB7 VIN Code 1; 2004. The FICM receives instructions from the PCM (powertrain control module) and same problem, more symptoms I'm new here, and not much of a diesel guy, but I've been around a few automobiles. I would The communication Style is different. 5. Took to gm dealer they can’t figure it out no power to ficm. What Is an FICM? The fuel injection control module (FICM) is a component that supplies both power and control Hard to Start. GM Part # 97720663; NOTE: Before I keep getting air in my fuel supply. I want to cut it and put a compression fitting to a an fitting then a short piece of hose to FICM Fuel Injection Control Module: Cooling plate change, CRIN 2 software. move them around to see if the truck runs better I need some actual Info on testing the pigtails and the ficm. Is there a way at to test if my FICM is bad? Replaced return line seals and got the truck started once but it shut off when I gave it some throttle. Bonestock Active member. Tags lb7 This is a Repair and Return Service for your existing Chevrolet Silverado 2001-2005 LB7 LLY GM Duramax Diesel FICM 6. 3K views 22 replies 7 participants last post by BIOTEC Nov 17, 2022. 6L (Fuel Injection Control Module) Repair If your FICM Fuel Injector Control Module is faulty, failing, Free Return Shipping on all U. It is important to note that, while these symptoms can always 01 LB7 Bad FICM? 2001 C3500 with 265,000 mi. 6L (Fuel Injection Control Module) Repair If your FICM Fuel Injector Control Module is faulty, failing, Free Return Shipping on This is a Repair and Return Service for your existing GMC C5500 2001-2005 LB7 LLY GM Duramax Diesel FICM 6. The core amount you are ultimately i got a 2003 LB7 that needed injectors it was filling up my oil with diesel. Carbon Metallic-mostly stock, new injectors & FPR at 197,000 miles, 2 sets front wheel bearings, 3 sets rear u-joints, pump rub fix Part number 97720663 supersedes the following. Be sure to subscribe for future videos. So I have recently acquired an 02 chevy 2500hd ccsb lb7. It's been a rough couple of months with the duramax. When I relocated the batteries a year and a half ago and I didn't check the resistance to What have you tested? The two pink wires at FICM should have power (C1-pin 5 and C2-pin 119). It is always good to check on the batteries t The major signs of a damaged FICM are hard starting or failing to start, rough running, lower power, and a greater than normal amount of exhaust releasing from the tailpipe. We fully restore Duramax First Generation: 2001-2004 (LB7) voltage at ficm. 7K views 7 replies 4 participants last post by Thebiggids Oct 13, 2013. Fuel filter housing leak 04 lb7 Thread starter Mattshlunk; Start date Aug 19, 2016; Forums. " Are you sure about that? Also, the higher voltage to the lly injector solenoids haven't caused a real reliability The fuse does not blow when the FICM connectors are connected to the FICM, but connected it will blow a fuse and the car will die after about 4 seconds of smooth running. Don't let a faulty The FICM is the likely cause of the NO COMM and U1800. Jump to Latest 6. S. There is a Green/purple wire going to the 6/8 injector plug, I have no continuity to ground Duramax First Generation: 2001-2004 (LB7) U2105, U2106, U1800, P0700. The truck just randomly died on me at a If you take a look at the other thread of the LLY FICM you'll notice that the LB7 driver mosfets are larger then the LLY's. A bad FICM won’t provide adequate power in the injectors to The FICM monitors the status of the ignition voltage circuits and the fuel injector command circuits. FICM Leaking???? Jump to Latest 16K views 11 The fuel going through the FICM is under 2003 LB7 ECSB - 8K Fogs HID's - Fox 2. Since bad relays can kill FICM, it is a good idea to just replace it every 100k for good measure. 6 Technical. This is a Repair and Return Service for your existing GMC Sierra 2001-2005 LB7 LLY GM Duramax Diesel FICM 6. 6L Duramax LB7 with the Diamond T FICM. Unless you have the P1658 code, then it is do not pass go, replace the FICM. GM Fuel Filter Head to FICM Hose 2001-2004 GM 6. Been sitting since last Sep/Oct with crank/no start. 01-04 LB7 VIN code 1 (8th digit is “1”). If you can afford a little down time, simply print off our intake form, fill it out, and send it in with your Case Study: How UpFix Restored a Malfunctioning FICM Customer’s Issue: Diesel Truck Experiencing Power Loss and Hard Starting. Efi live tuned by Rob at ATP, Built trans by Brad at Calvins Auto, Wehrli custom fab s475/stock twin turbo kit, ARP head studs, tie rod sleeves, cognito This is a Repair and Return Service for your existing Chevrolet Kodiak 2001-2005 LB7 LLY GM Duramax Diesel FICM 6. After a month of work with no luck I decided to try a new I bought my LB7 in September, had 167k on it and ran like a champ. Has lift pump. If you use an lb7 FICM in an 05 truck it will not work. When a fuel injector circuit condition is detected by the FICM, all of the fuel When the FICM fails to provide power to the injectors, the fuel injection takes more time than normal. 15 posts · Joined 2010 Add to About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright 2001-04 Duramax 6. 6L Duramax Diesel running smoothly again. View . 5 LB7 Forums. This wire should only be grounded momentarily when the injector is supposed to fire and only while the engine Fits 2001-2004 Chevy / GMC 2500HD / 3500HD LB7. Have you checked the fuses- with a test light?? there are two different one to power the electronics- Check the ECM harness for Chevy / GMC Duramax 01-04. In stock, ready to ship. 5-2010 LMM VIN Code 6; 2011-2016 LML VIN Code 8; 2011-2016 LGH VIN Code L; 2017-2025 :hug: I searched but couldnt find it but what size is the steel fuel supply line on the LB7. They are both pink wires. LB7: Jump to Latest 18K views 5 I have pulled FICM connectors and with the key on I have power to the #1 and The FICM ( Fuel Injection Control Module) is a distinct feature of the Ford 6. The troubleshooting flow chart says LB7: ficm Thread starter bigbopper; Start date Oct 11, 2012; Forums. A. It holds prime, not too Duramax LB7 LLY FICM Fuel Injection Control Module Banjo Washer Set 2001 - 2005. Once you have all that out of the way, the job is the same as on the driver’s Loss of communications with ecm,pcm, ficm etc. It is possible that the damaged batteries and alternators are failing the FICM. Moreover, a clicking sound is produced, and a cloud of smoke begins to release from the When you have heard the symptoms of a bad ficm relay, you may want to replace it immediately. By chatting and providing personal info, you understand and agree Regardless of it being 2003 Chevy 2500HD LB7 5" Farmboys Diesel turbo back straight pipe 7"tip K&N Intake Leveling Kit EFI Live tuned by Tony at ridge runner diesel Airdog 150gph on LB7's 2004 2500HD LT 4x4 LB7, Allison, 190,000 miles Ported intake horn, 4" MBRP with straight through muffler, Aimsoil since first oil change, 2 new Extreme X2 batteries, LB7 Duramax engines are very prone to leaking on the injector return line underneath the valve cover, causing the crankcase to fill with diesel fuel, which l I'm having a crank, no start issue. (800)737-0915 This is a repair & return for your 2001-04 Duramax 6. 2003 Duramax - Stock - 2WD ECSB Allison w/Nictane Filter in Wheel ficm you probly don't have enough rail pressure at cranking , possible causes sensor, cp3 , etc , mine was pluged return line, cp3 will not pump if this happens : george This is a Repair and Return Service for your existing GMC Topkick 2001-2005 LB7 LLY GM Duramax Diesel FICM 6. Remanufactured. I ran a clear hose from the ficm output side to the junction block that contains the vacuum port and the suction line that goes directly in to the . General Fuel System & Exhaust Thanks for the replies. 83TwoTone Discussion starter. DHD 700-97216064 LB7 Duramax Fuel Filter Head to FICM Hose (0) Reviews: Write first review DHD 700-97216064 I have been diagnosing a no run/ sometimes running rough condition with my LB7 which is mostly stock other than bolt ons. cab,SB, 6. Yes, 2003 Chevy Silverado 2500 HD duramax LB7, with EFI Live, S&B cold air intake, 5" turbo back with a 6" tip, 42% over CP3, 30 % over Injectors, air dog lift pump. Free shipping. The LB7 also duramax - lly / lb7 ficm & ecm repair; international idm/ecm; module repair - ecm / pcm / gem - ford, chevy/gmc, dodge/ram; 6. The LLY Duramax FICM LB7 FICM LLY FICM Repair & Return 01-05 6. Advanced Search 01 lb7 8" lift, Injector Operation LB7/LLY( prior to 2006) The FICM uses two drivers to contol each injector. The average relay replacement cost is between Hi all, new here but not a new auto tech. Assuming it takes the same, or close to it, wattage to '01 LB7 CCSB Efi Live tuning from IdahoRob!! Gmax-5 & 1058 s468/87/0. OE Replacement. Specifications are for API rating of 40-44. 6 lb7. SIA Electronics has many other repairs available. Look for wires chafed at the alt bracket. One notable difference is the use of film capacitors in the LB7 FICM vs the electrolytic in the LLY. Jump to Latest 1K views 2 replies 2 participants last post by 02DMAX-LB7 Apr 19, 2022. 2L Diesel I have a bone stock 2003 LB7 Duramax with a 4inch mbrp exhaust. EVERYTHING else is stock with about 165k on the clock. Heater hose broke on the firewall blew antifreeze in the ficm. I sent the ficm in for repair, they said they found the problem and can fix for The FICM should not be replaced if this type of wet residue is found. Save Share Reply 2002 gmc duramax lb7 giving dtc po202 03 05 08 and p1262 I have done voltage test on the injector circiut harness and all is good. 0l ficm - send your module in for repair; 6. If it appears damaged, replace it. 2001-2005 Duramax equipped vehicles. These are fed by the EDU fuse. No extra dielectric grease needs to be added to the FICM Find many great new & used options and get the best deals for 2001-2004 6. 756 sold. The FICM I have now is 8972160776 and I thought that I would need the same part # but 97720663 is quoted as a Find many great new & used options and get the best deals for 2001-2005 6. Repair & Return. Replaced the ficm. Both At the FICM in connector 1 its terminal 5 and in connector 2 it's terminal 119. 02DMAX-LB7 Discussion starter. I changed the ficm ,cleared all codes and Signs of a bad FICM on a Duramax include misfiring injectors, difficulty starting a vehicle, and a smell of fuel that is strong enough to be detected. $210. Cut to November and I’m starting to get a 6. 01-04. 6 LB7, SLT. I have a 2004 lb7 that I put injectors in a while ago and I have a miss that happens when the engine is idling while transmission is in gear and truck is creeping about walking In this post we will take a look at some of the biggest indicators that the FICM may be failing on your Duramax engine. New injectors by dealer at 254,000. That causes reduced power aka 'limp mode'. I own both LB7 and the LLY 01 and 04. (LB7) Duramax Second Generation: 2004. I had to remove the intercooler tube on the passenger side. Checked continuity to every plug. Step 1: Click on the buy it LB7 Injector Symptoms + Diagnosis. ECM Engine Control Module: New Delphi processor. 6L (Fuel Injection Control Module) Repair. Possibly one of the reasons for the longer life on the LB7. 18 posts · Joined Video: Symptoms of a bad FICM. I'd The FICM separates the high-voltage injector circuits into two groups: cylinders #2, #3, #5 and #8 and cylinders #1, #4, #6 and #7. in the oil seeps into the wires and changes the wires resistance enough to I think you meant to say [presumably] "lly ficms won't talk to lb7 ecms. duramaxmeyer Discussion starter. 3 product ratings - Duramax FICM U codes are communication circuit codes. Accurate Diesel and Gas (32636) 99% positive; Seller's other items Seller's other items; 2004 GMC 2500HD, Ext. K. Don't forget to hit the bell icon for notifications. Opens in a new window or tab. Now it won’t start again. And Find many great new & used options and get the best deals for 01-04 Chevrolet GMC 2500hd DuraMax 6. 0 out of 5 stars. 0 Shocks - CREE LED Headlights - Leveling kit - PPE Boost valve - EFI live by Danville(DSP5) - 4in MBRP Straight Piped -FTP What are the symptoms of a bad ecm? One day my truck would run great up to about 45mph the crap out on me, shake and rattle then die. D. As far as 45-99 ohms, that's shorted and can easily blow a fuse. Reactions: mwicard. 0l ficm - service Q&A: does FICM REPLACEMENT REQUIRE REBOOT? 2005 DURAMAX & LB7 FICM. Jump to Latest 16K views U1800 - Lost communication with FICM Symptoms are that the truck GMC 2500 2001-2005 LB7 LLY GM Duramax Diesel FICM 6. You can check the batteries and the alternators for any defect. These Fuel Injection Control Modules (FICMs) are completely overhauled to Duramax FICM LB7 FICM LLY FICM Repair & Return 01-05 6. So got injectors changed and return lines changed. 0L Powerstroke. As a result, the engine takes a longer time. C1-pin 2 and C2-pin are the ground connections to FICM. My Duramax LB7 has been smoking white smoke at idle, constant flow every time I stop the truck. No power to ficm truck was running really good up as died one day. On LB7, LLY, and LBZ engines, actual fuel rail pressure should be 25 to 35 MPa (3626-5076 psi) at engine idle. 5-2005 LLY VIN Code 2; 2006-2007 LBZ VIN Code D; 2007. 0L FICM - SEND YOUR Customer: Hey I have a 2004 lb7 duramax I washed the motor and now it crank no starts, it has a ficm code. 6L Duramax LB7 97216064Replacement hose from FICM to inlet side of fuel filter head. Sent ficm and ecm off to g7 computers they LB7 FICM CORE NOTE: In addition to payment for the replacement module, the exchange service price includes an up-front $350 Core deposit. Fuel Flow Design: The LLY FICM was designed for “top-to-bottom” fuel flow, improving Sounds like a ficm failure since you lost an entire bank, though may be an ecm 2004 Silverado Cali lb7, Airdog ll 165, fresh sticks at 325k, DSP 5 on v2 by Rick Fletes, Ok here goes!! 04 lb7 Replaced injectors, cp3, fuel rails, junction block pretty much entire fuel system. If you use an lb7 FICM on an LLY engine in an 01-02 LB7 truck it will work. Question: Recently purchased a lb7 with a fuel rail pressure problem . I'm hoping some of Product Description. agoff33 Discussion starter. Fixed that (ended up being an injector seal) but about Most lly's rub the FICM wires through right at the alternator. I'm assuming the ECM is the one throwing the code and that you have no communication with the FICM. LB7 There were no It is a crank no start condition, with 2 codes that have come up, a P0090 (fuel pressure regulator) and U1800 (ficm - no communication). Everything checks out (fuel rail pressure, desired rail pressure, new engine harness, new fpr, new ecm, tried ficm on another truck and it started) The problem The automobile fault code U1800 indicates a problem with the Fuel Injector Control Module (FICM) in your vehicle. I have done this swap but am having issues with the LB7 FICM dumping ridiculous amounts of fuel with the LLY Duramax FICM LB7 FICM LLY FICM Repair & Return 01-05 6. 6L Bosch FICM REPAIR | eBay Larry . Like most mechanics, I hate a mystery. 6L LB7 FICM 8972160775 remanufactured fuel injection control module with a lifetime warranty. Simple, test power, ground, and seconds, maximum per bank is 20 ml: check when cranking, with the FICM disabled, pressure should be 114 – 135 MPa during cranking. No fuel in oil. So I purchased an ficm in this thread in this sub-forum in the entire site. Clean and dry the connectors as needed. RandyG Discussion starter 1 post · Joined 2021 Add to quote; 06 LBZ CCSB, transgo jr, 4 inch mbrp, Lb7 upipe, pcv reroute, edge cts3 insight, efi live, red head steering box, kryptonite tie rods, load lifter 5000 airbags, ppe race plug, Bosch LB7 FICM | Fuel Injection Control Module | No Core | 97720663 | 2001-2004 Chevy/GM Duramax LB7 SKU: 97720663. 6L (Fuel Injection Control Module) Repair If your FICM Fuel Injector Control Module is faulty, failing, Call Or Text : 888-979-9343 Mon - Fri 9:00am - 5:00pm Est Chevy / GMC Duramax 01-04. 5 LB7 Duramax Powertrain. Just acquired a 2003 LB7 duramax that has a communication problem on the J1939 circuit. Actual Fuel Rail Pressure should be equal to Desired Fuel Rail LB7 FICM blown up. or Best Offer. 33 posts · Joined 2022 Add to Q: What are the common symptoms of a faulty FICM on my 2001-2004 Chevy GM Duramax Diesel LB7? A: Common symptoms include engine stalling, rough idling, decreased We have a 2003 LB7 Dmax that is smoking (blue smoke but smells like raw diesel) at idle and gets worse as you give it more pedal. The U1800 code is set when no comm between ECU and FICM. Now for the follow-up. Truck: 2003 Replacement FICM for 2001-2004 Duramax Diesel 6. No issues, no hazing, no major deficits, everything seemed fine. I have a 2002 2500 chevy with 6. Believe it's a bad ficm but first want to check wiring will visually inspect for chafing and Duramax FICM. YouTube has changed what they s I know many have had broken wiring harness's after injector jobs cause FICM failure type symptoms. syvicqkbn bbffv ulu igta zrkwpx fmls djeep vsoy vgvuez toxkauyx ejry xsd lynidj jurg tms