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Chevy / gmc truck: crank no start no communication with fpcm – Auto Repair Chat

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Come along with Eric O. at the SMA shop as he has a look at this 2009 Chevrolet 1500 5.3 that was towed in as a crank no start. It has a code stored in it U0109 for "loss of communication with fuel pump control module." You can follow along with Eric O. as he brings you along and diagnosis the FPCM. We also get to use our J2534 Interface device and do some programming.
Chevy FPCM Vid : https://youtu.be/NqWPu6lCEyQ
Wells CounterPoint Video Ep.7--Fuel Pump Driver Modules, DM100 & DM103: https://www.youtube.com/watch?v=2OF10FML0f8
Interested in stuff seen in the videos or the tools and toys Eric O. likes and uses? Check out the S.M.A. "A-Store" and help support the channel! : http://astore.amazon.com/httpswwwy0837-20
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Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not South Main Auto Repair.

47 thoughts on “Chevy / gmc truck: crank no start no communication with fpcm”
  1. Avataaar/Circle Created with python_avatars Sam Knop says:

    I know this is from 5 years ago and you may never see it. but an old guy once taught me you can stick an extension and a swivel thru the holes in the spare and drop the bolt for the entire spare holder and the whole thing will drop on the ground. just watch your head🤣

  2. Avataaar/Circle Created with python_avatars Mark Flint says:

    Or save yourself half an hour and just bypass the control module and power the pump if it’s faulty it will trip the breaker.

  3. Avataaar/Circle Created with python_avatars Andrew Arney says:

    Thank you for the video, this helped me to diagnose and repair a 2011 sierra that had no communication from the fscm

  4. Avataaar/Circle Created with python_avatars watershed wonders1 says:

    For sure the guts from one of those capacitors has leaked out that brown residue yeah ive seen that before…and smelled it aswell

  5. Avataaar/Circle Created with python_avatars Byron Morris says:

    Can, I have the dog Job Please?

  6. Avataaar/Circle Created with python_avatars Ryan Tidwell says:

    I don't see any need to have a freakin programmable fuel pump module. This is nothing more than highway robbery.
    "If I can do it you can do it" …Well only if I have thousands of dollars of diagnostic equipment and programming garbage (and an ancient laptop with internet explorer and old version of Java Rofl) What a load of **
    What year did they start putting this crap in? I'll buy an older vehicle and put a new engine in it.
    Well you done a good job. This kinda stuff just ticks me off.

  7. Avataaar/Circle Created with python_avatars Donald Painter says:

    Not downing you at all Mr o but I would have cut that cable and got that tire out of my way first thing and unplugged the fuel pump then tested I try to isolate things if I can but you are still the man thanks for the videos I'm a 30 year technician myself and still learn everyday and you are a good teacher always know never assume that's how I was taught 30 years ago

  8. Avataaar/Circle Created with python_avatars Phillip Lopez says:

    They say that people start to look like their pets after a time , so here is your proof .

  9. Avataaar/Circle Created with python_avatars Jon Miner says:

    Hi, Mr. O. I have an idea. Let's start building vehicles with no computers needed. Good idea? Thanks for sharing! Stay healthy!

  10. Avataaar/Circle Created with python_avatars Willie Gillie says:

    It appears we have some real flunkies designing and building the cars today with all the issues that come with new designs but no responsibility for the outcome of their design. No wonder the dealerships try to con so many people into an expensive warranty they make no honors of accepting. Where did it all go wrong?? I can remember when they sold cars with a free bumper to bumper warranty for up to 100,000 miles. Could it be they lost all confidence in themselves?

  11. Avataaar/Circle Created with python_avatars Dan Sisulak says:

    What a poor place to mount the FPDM…We had a discussion on why we get field returns at Delco as to mounting of modules. I think there was a Pontiac that had high failure rates because ECM was mounted where front wheel splash would contaminate the wiring. I think the first BCM were in the passenger kick panel to keep them from damage. I think all the manufactures should make the in-tank fuel pump accessible through the trunk or bed of a truck. They could then locate the driver module in a clean dry place.

  12. Avataaar/Circle Created with python_avatars SerenoOunce says:

    I'm curious, for the DIYers good with electronics repair maybe you can just swap over the ROM chip(s) when replacing these. Or even rewrite them with a programmer which can be had pretty cheap. Save a trip to the dealer for programming.

  13. Avataaar/Circle Created with python_avatars Philip Morgan says:

    Another module that could be a relay

  14. Avataaar/Circle Created with python_avatars Tom Colton says:

    Love your stuff Eric. Thanks for the education!

  15. Avataaar/Circle Created with python_avatars 1320Jay says:

    Good to know. I just replaced my fuel pump in my ‘09 Chevy. 100k miles.

  16. Avataaar/Circle Created with python_avatars Vincent Gotter says:

    Have been watching pretty regularly, but the old stuff is always really good. I think both Eric and Mrs O are lucky.

  17. Avataaar/Circle Created with python_avatars Don's Junkmail says:

    Well nice of gm to put the box next to the spare tire …maybe they thought he could have flat at the same time.

  18. Avataaar/Circle Created with python_avatars Mark Malikowski says:

    WOW! I guess General Mayhem doesn't think that vital electronics deserve to be treated as such. Another excellent video!

  19. Avataaar/Circle Created with python_avatars Lewis Cornine says:

    As a retired mechanic of 45 years i worked on construction equipment and municipal equipment in N.J i would of loved to work with you you are a smart Son of a gun but i really think Misses O is your mentor!😁

  20. Avataaar/Circle Created with python_avatars 101 fish says:

    We appreciate. Mrs Os opinion.

  21. Avataaar/Circle Created with python_avatars donald lawton says:

    My 96 s10 spare tire,cable broke on the entrance ramp getting on the I state . Thankfully car behind me stopped. The tire stopped just over the white line of the 1st lane. Close cal,all is well,lol!

  22. Avataaar/Circle Created with python_avatars A Good Neighbor Auto repair 1 says:

    Very nice explanation

  23. Avataaar/Circle Created with python_avatars Wind Ward says:

    How long can it take to update multiple modules on the bus?

    The module burnt power device is in a QFN (Quad Flat No Lead) surface mount power package. Which probably uses a full bridge (maybe just a half bridge? depends on motor operation and circulating currents) PWM modulation to control the fuel pump motor speed. The PCB is most likely bonded to the aluminum heatsink (body) with a special adhesive or double sided adhesive tape.

    For suspected electrical connector pin oxidation intermittent connections I use Deoxit D5 contact cleaner/lubricator. After applying D5 on both the module and connector side and reseating the connector if the problem does not go away it is not the connector pin connections unless one is bent or there is a broken wire.

  24. Avataaar/Circle Created with python_avatars James Kennedy says:

    And he said. It would be nice if the Tire wasn't in his way. (LOL) Why didn't you just remove Tire from Work area? It would've been an easy job just to take it out and clean up the Rust so that the Owner could in the Future, remove Tire for Tire Flat. Wouldn't it? I know hard to charge for things like that. Those little things keep your Customers coming back to you. Also, why didn't you just get the proper Tool instead of using the Vise Grips? Just a thought.

  25. Avataaar/Circle Created with python_avatars gewing61 says:

    Great video. Thanks for sharing

  26. Avataaar/Circle Created with python_avatars Gary Obermuller says:

    Thanks very much for the video

  27. Avataaar/Circle Created with python_avatars Robert Greatsinger says:

    Would a 93 k2500 have a computer? I am about to yank pump out of the tank. 0/2 has been out hanging for while , upon time to find an buy y-pipe w/ 0/2 bung hole…. Or battery needing a jump dying "wore out" three year old Spectra pump? So circuit board or sensor? Or just change the pump. Distributor and or rotor would fail gas to throttle body, right ? Yes I am a d-i-y, backyarder…

  28. Avataaar/Circle Created with python_avatars Doug Owens says:

    Wow poor engineering and lack of quality control

  29. Avataaar/Circle Created with python_avatars Rezcarguyz says:

    Hello thank you for the great video 👍👍
    What was the website and programming tool (BOSCH) you used for this job?

  30. Avataaar/Circle Created with python_avatars Arthur Neal says:

    Hi my name is Arthur and I have a 2000 Chevy Silverado 1500 series and I took out a V6 and I put in a V8 LS1 motor back in it and I have no crank and no start

  31. Avataaar/Circle Created with python_avatars Nearly Normal says:

    The automotive industry has gone nut. Why the hell is there such a complex expensive pos to turn on or off a fuel pump.

  32. Avataaar/Circle Created with python_avatars lou oldschool says:

    it didn't pass the smell test

  33. Avataaar/Circle Created with python_avatars Harry Harding says:

    So you need a Bosch uie and then pay for the GM service to program to replace drivers ?

  34. Avataaar/Circle Created with python_avatars Bull Dog says:

    Your Amazon link is dead!
    Thank you for what you do to help the poor people…

  35. Avataaar/Circle Created with python_avatars Matthew Price, Auctioneer & REALTOR says:

    Sometimes those stupid fuse box clusters go south and need to be replaced. It's a PITA.

  36. Avataaar/Circle Created with python_avatars Ryan Hogan says:

    Can’t you just ohm, or continuity test the module, from the positive coming in, and any grounds, be sure the problem was not a dead short internally

  37. Avataaar/Circle Created with python_avatars calholli says:

    Seems like the worse place to openly expose a computer module– but what do I know.

  38. Avataaar/Circle Created with python_avatars Lo Paka says:

    No ka oi

  39. Avataaar/Circle Created with python_avatars Anthony Salonek says:

    what's the ( FIX IT button for, right side screen

  40. Avataaar/Circle Created with python_avatars shadymaint1 says:

    I've got a good used GM FPCM that I use for quick easy testing. It's very common here in northern MI for the fuel pump driver to fail.

  41. Avataaar/Circle Created with python_avatars OBDZON says:

    Thank you for your video,helpful,and detailed

  42. Avataaar/Circle Created with python_avatars John Long says:

    Replaced one a while back that had a 2 inch hole in the back.

  43. Avataaar/Circle Created with python_avatars R24v P says:

    by any chance you see this , my 08 chevy is having similar problems and i cant find the fscm no wheres to be found removed that damn spare tire still nothing found other then a missing crossmember

  44. Avataaar/Circle Created with python_avatars Hola! Meatwad Baggins says:

    I have a Chevy 5.7 90s era Yukon. When I put a test light on the distribution box for the main 4 pins of the fuel pump relay I keep getting different results. Sometimes 85 dont work. Sometimes 30. However usually 30 fuel pump ground and 86 constant will work together and 85 pcm and 87 will work together. Right now they all work except 30. But that will change in 30 seconds

  45. Avataaar/Circle Created with python_avatars Carl Kraus says:

    Another thing about my S10 Jimmy is there is no safety lock on the spare tire. It comes down easy. But the cable rusted through and the spare tire fell out of the vehicle while I was driving. Another driver ran into the spare and broke his windshield and damaged the top roof. Now we know why GM put the safety lock on newer trucks.

  46. Avataaar/Circle Created with python_avatars Carl Kraus says:

    The S10's and Jimmy models don't have that pump control module. S10 just have a relay and are controled by the main computer ecm. Sometimes old school is better. Mounting electronics under the vehicle is kinda dumb.

  47. Avataaar/Circle Created with python_avatars Peter Souza says:

    Love the channel, question about grabbing multiple wires with the amp clamp: without knowing each circuits purpose, would ground wires potentially offset any positive amp readings given the amp clamp is directional?

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