Search results

Search the forum Search Articles
  1. R

    Howdy Yall, looking for recommendations for LMM ECM expertise in the Weatherford Tx/Fort Worth area.

    I have been conversing with another owner on another forum that appears to have the same problem that you do. I didn't recognize the common problem between the two of you until I read your original post again. He said that his starter relay would click 2-3 times per second and the starter would...
  2. R

    ABS and Harsh Downshift

    Attachment may help if the sensors don't fix the problem. Interesting item from the attachment: Conditions for Setting the DTC • The brake pedal is sensed as applied for 6 minutes. • The vehicle speed is greater than 21 km/h (13 mph). AND The DTC C0161 00 can be set if the brake switch is...
  3. R

    Boost Leakage and Compression test results

    If it were me, I wouldn't use the 60 HP economy tune pulling trailers. Find something in the 30 HP range. Much easier on the engine and the trans. The engine and trans will live longer if you take it easy when pulling hard.
  4. R

    u2106 help please!!!!!

    Use the search function of your PDF reader for 'relay' and look for the result that you want. I don't think they have 'explanations' per se regarding delays. The fusebox inside the cab may be called the 'MBEC' or you could search for the fuse or circuit you need.
  5. R

    u2106 help please!!!!!

    I don't have any reference that matches that way of identifying a circuit or fuse, nor do I have a truck of your family. Maybe you can use the attachment and identify the fuse involved. Full wiring diagrams are available here https://www.gmupfitter.com/body-builder-manuals/
  6. R

    u2106 help please!!!!!

    Chevrolet DTC U2106 Make: Chevrolet Code: U2106 Definition: CAN Message Not Received from TCM Description: The ignition is ON. Cause: The modules that communicate on the CAN system are...
  7. R

    Howdy Yall, looking for recommendations for LMM ECM expertise in the Weatherford Tx/Fort Worth area.

    Clear the codes and see what comes back. That list is like pulling a whale into a 4 ft fishing boat.
  8. R

    Howdy Yall, looking for recommendations for LMM ECM expertise in the Weatherford Tx/Fort Worth area.

    Some additional info for your GMLAN problem. Remember that any device on the plan can pull down the entire plan. Kind of like those Christmas tree lights where when one bulb goes out, they all go out. With lights, it's easy to see which one is out, with our trucks it takes more effort.
  9. R

    Howdy Yall, looking for recommendations for LMM ECM expertise in the Weatherford Tx/Fort Worth area.

    Free wiring diagrams are available here https://www.gmupfitter.com/wp-content/uploads/2021/05/2009_LD_ElectricalPickupsChassisCabs_100813.pdf ALLDATADIY does have wiring diagrams, however, my subscription is to their older system and the wiring diagrams there are not as good as GM's. Don't know...
  10. R

    6.6LML bucket of DTC's - help please

    See attachment. This pertains specifically to my 2008 LMM and I think that the MAPs were changed somewhat since then. But that's the best info I have and probably still good in a basic sense. Not being able to correctly calculate the 'boost' can be a real problem in getting the engine to run...
  11. R

    cranking with the key on

    Post #1 sounds like a stuck relay. Pull your starter relay and swap it with another same number. This is to tell you if the relay is good. Get the wiring diagram here https://www.gmupfitter.com/wp-content/uploads/2021/05/2006_LD_CKFullSizeElectrical.pdf Exactly what the problem is willl only...
  12. R

    (SOLVED) Weird fuel pressure symptoms

    This is better than the circus! Can't wait to find out the actual problem and resolution.
  13. R

    LML Maf stuck at 637.55 g/s

    Either bad MAF or short to power. See attachment https://www.dtcdecode.com/Chevrolet/P0103
  14. R

    serpentine belt comes off

    There are several firms that make the mounting brace. PPE is just one of several.
  15. R

    New code thrown

    https://www.autocodes.com/p1626_chevrolet.html
  16. R

    LMM: Steering column removal

    Attachment may be of some help. This for my 2008 LMM.
  17. R

    lbz keyless entry

    Look up your RPO codes at https://www.vindecoderz.com/EN/Chevrolet if you want to know what they are.
  18. R

    Need help with fass motor

    I would call anyone who sells FASS and ask them the best way to accomplish what you want to do. I suspect that going direct to FASS might be the best thing, but not sure, I've never done it.
  19. R

    07.5 LMM Electrical Issue

    Great post Dean and glad to see you posting over here also. Yo have lots of experience with our trucks and you're willing to share. Those GMLAN problems are certainly headscratchers and few have the knowledge you do in figuring these things out.
  20. R

    07.5 LMM Electrical Issue

    Thanks for your posting. When our trucks have problem with their LMM GMLAN systems, it is indeed very difficult to accurately diagnose the problem. Biggest problem is that few people have any understanding of the GMLAN, its components, and operation. Next is that few people have a scope capable...
Top Bottom