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  1. R

    Erratic Electrical Truck - Don't Know What to Make of IT

    When those 3 codes appeared, I recorded them, did some preliminary checking, and could find nothing wrong. I deleted the codes. They have not returned. Battery voltages are good at rest, a little high when the engine is running - I'd like to see closer to 14.0 V. Almost no voltage drop from the...
  2. R

    Erratic Electrical Truck - Don't Know What to Make of IT

    I have been thru my engine compartment and recovered my electrical wiring with new split loom and Tesa tape. Did that a few years ago. That doesn't mean that there isn't a short somewhere. I use a Gates Green Belt serpentine because I noted at the time there were some belts that produced the...
  3. R

    BCM data link

    Introduction A new body control module (BCM) must be programmed with the latest operating software and vehicle calibrations. Ensure that the following conditions exist in order to prepare for BCM programming: The battery is fully charged. The ignition switch is in the ON position. The...
  4. R

    Erratic Electrical Truck - Don't Know What to Make of IT

    Recently, my truck turned on the check engine light and there were some codes: P0108 Map Sensor High, P)128 ECT Low and P2563Turbo Pos SensorCircuit A High., all the involved sensors use the 5V Ref from the ECM. The truck ran just fine as far as I could tell. Never had codes like that in the...
  5. R

    05 LLY communication issues

    I can't find this fuse for your truck model and year. See if you can find this (or the correct ABBR) and then see what circuit this is. You can search wiring diagrams by the circuit number to find what that circuit feeds...
  6. R

    Engine Codes while towing Heavy.

    P2563 is often about sticky vanes. See the attached info
  7. R

    Engine Codes while towing Heavy.

    https://www.dtcdecode.com/Chevrolet/U1016 https://www.dtcdecode.com/Chevrolet/U1096 These should give you a little idea of what's going on.
  8. R

    C0055 dtc

    When your ABS lights up, that will automatically light the others and Service Brake System on DIC also Service Trailer Brakes messages. Not that on the attachment, there are different pin numbers to test. The attachment is for my 2008 LMM so that will not be what you need unless you have an LMM
  9. R

    2007.5 Chevy 2500 4x4 6.6 LMM Duramax 100,000 miles. More problems.....

    I'll guess we'll see if 'the shop' knows what they're doing to diagnose it. For your sake, I hope they did
  10. R

    2005 LLY

    That's a lot of $$$ in that engine.
  11. R

    2007.5 Chevy 2500 4x4 6.6 LMM Duramax 100,000 miles. More problems.....

    Truer words were never spoken.
  12. R

    Stolen LLY in Colorado

    Be prepared to ARGUE about the proper reimbursement. Don't just roll over and take what they offer.
  13. R

    2003 6.6 Silverado H.D Duramax code PO802

    Home ChevroletP0802 Chevrolet DTC P0802 Make: Chevrolet Code: P0802 Definition: Malfunction Indicator Lamp Circuit Malfunction Description: Engine started and the PCM detected an incorrect voltage on the...
  14. R

    Lml no power

    You MAY have a bad map or circuit for the MAP. See the attachment. If you have a scan tool, check BARO vs MAP. BARO should remain relatively flat while MAP should change quite a bit if boost actually increases. I'm thinking that P026D below may be the answer to your problem just because it...
  15. R

    Crank no start P2146

    What fuse was blown? Might be helpful to know what that fuse leads to.
  16. R

    Another issue with coolant.

    Oil cooler leaking coolant?
  17. R

    Lml no power

    MAP sensor is my first choice followed by boost leak followed by MAF sensor. MAP and MAF are major contributors to ECM that determine engine fueling.
  18. R

    LMM wheel bearing on a classic

    See the attachment
  19. R

    Truck died, lost panel except tach and all front door controls. Also somehow AC.

    Not sure what your little plastic case is. If you attached your jumper+ to the mega fuse, concentrate there to start.
  20. R

    Upper radiator hose. Coolant leak.

    And it's hard to spot leaks in the finned area of the radiator. Some dye and a UV light will help you find the leak.
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