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  1. R

    Trailer Brake & Parking assist fault

    A new trailer brake control module, which mounts right next to the trailer brake relay, must be programmed. A quick trip to the dealer, or independent garage, is in order. If the module was your problem, you may have a working, error free trailer braking system. If the problem lies elsewhere...
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    AC on and off

    In order, front to back is: Trans Cooler A/C Condenser Intercooler Radiator I don't think the Intercooler could have any likely effect on the performance of the A/C Condenser. If the Intercooler was really plugged, you would have other much more noticeable issues, i.e. high coolant...
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    Trailer Brake & Parking assist fault

    When you say you are getting a 'fault', are you referring to a message on the DIC? Or a check engine light that has a DTC associated with it? or ?? And this is for your 2008 truck in your signature?
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    Strange Turn Signal / Marker Lamp Electrical Issue - Need Help

    What do you see with your headlights on with turn signals? Different? How about DRL's? anything different there?
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    Brake to floor after mast cyl change

    Crack one of the lines at the connection to the MC and have a friend slowly push on the brake pedal. While holding the pedal down, tighten the line. (sounds a lot like bleeding brakes, but your are bleeding the MD). Repeat 4 or 5 times. Then do the other connection same way. If you have...
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    ECM harness connector

    I looked up one of the connectors for my truck and found this: https://www.wholesalegmpartsonline.com/products/GMC/CONNECTOR-Emission-Control-System/3101224/88988935.html You might try getting the correct part number for the part you want and then google that part to see if anyone has it.
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    LB7: Can't get it to start.

    I would pull the fuel filter and fill it (or a new filter) with fuel and see if you can't get it to start. And/Or disconnect the fuel line at the drivers side near the master cylinder and put fuel in a container (look for posts or you tube videos talking about using fuel system cleaner). If you...
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    LMM: best place for drive pressure gauge

    What is 'drive pressure' ?
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    LB7: Bad cp3?

    http://dieselperformancepodcast.libsyn.com/p0087-p1093-duramax-trouble-shooting
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    Need help.. outta patience.. outta ideas..

    It would be nice if that shop would give you some more information and suggestions as to what your problem might be. And what do you understand 'needs wired for constant power' to mean?? What needs to be wired?
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    P2152 after engine cleaning

    Yep, you washed the truck's engine a little too good. Injectors 2 and 5 likely have a short or poor connection in the circuit. Could be that new pigtails will be just the ticket. Before you do that, you might try using some compressed air on those wires to see if you can dislodge some of that...
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    Ron Nielson

    Ron Nielson
  13. R

    LMM: P0652 when truck is put in gear

    Something pulling down your 5V reference circuit. See PM on other site
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    LLY: Tranny codes P0717 and P0726

    You may benefit from having a subscription to ALLDATADIY.COM to see the detailed data for all of those DTC's. If you have a scanner, look at the freeze frame data and see if you find something there that may aid your diagnosis. It is apparent that there are speed sensor problems in various...
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    Very Low oil pressure(4psi)

    Maybe something here to help: INFORMATION Bulletin No.: 03-06-93-001D Date: October 09, 2008 Subject: Diagnostic Information on Turbocharger Malfunction Due to Lack of Engine Oil for LBZ, LB7, LLY or LMM Duramax(TM) Diesel Engine Models: 2001-2009 Chevrolet Silverado 2003-2009...
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    LMM: PCV Valve Question

    From my experience, the PCV system was designed to lessen emissions. Diesels have not been subject to emissions as strict as automobiles and other gasoline engine vehicles. Emissions laws for diesels have grown over the years to even include ships in ports. Everyone wants clean air to breathe...
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    Az registration

    I own a house in Phoenix, and have a car based a that house, yet officially live in Kansas. Both auto and house were inherited from my mom, so they were just a simple transfer to me, somewhat different than your situation. The car does not leave AZ, except for short trips. probably, if you use...
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    Ecm DTC. P0090

    DTC P0090 Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. See: Testing and Inspection\Initial Inspection and Diagnostic Overview Review Strategy Based Diagnosis for an overview of the diagnostic approach...
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    LMM: Short Block Assembly

    Doesn't make sense. The rings and the ring gap have to be coordinated. The pistons have a gap and the rings need to fit in the gap with designed clearances. Mahle, or any piston manufacturer, will have different style pistons and different specs for their rings for that particular piston style...
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    Bad fuel sending unit?

    Talk to the dealer and see if they will fix this. You hav nothng to loose by asking; and if you don't ask, it's coming OUT OF YOUR POCKET
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