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  1. R

    Master cylinder/Hydro booster

    Since you removed the brake lines exiting the master, I would loosen each line independently and bleed the master to make sure all air is out of the master, then do a full 4 wheel brake bleed. If your brakes worked before you replaced the booster, they should work after the booster replacement...
  2. R

    04.5 LLY Fass 165 troubles

    I would think that FASS would know what pressure would result from a given spring. if the pressure is say 14 currently vs 10 currently, would there be a different spring to make the adjustment??
  3. R

    Master cylinder/Hydro booster

    Use your VIN# to do the parts lookup on a GM-based website and get the correct part number. With the correct part # in hand, you can search and decide where yu want to buy your part, OEM or aftermarket, etc. Replacing the master cylinder and flushing the entire braking system, fronts and rears...
  4. R

    HELP No Shift Indicator Line, No Crank No Start

    There are 2 resistors int the circuit, and one of yours isn't there, at least not consistently. See attached.
  5. R

    BCM or VTD or both?

    You start by fully charging both batteries. Jumping batteries may get you our of a situation immediately, or it may not. I think you may have more problems that just discharged batteries, but that where you start.
  6. R

    P0090 After Changing Thermostats

    Some additional information attached. Wiring diagrams for most of our trucks can be found here: https://www.gmupfitter.com/pdflists/view/6
  7. R

    2007 GMC 3500 HD No crank No start

    Check pin 87 at the relay; key to start position should bring power to the relay. If not, follow the line up to the ignition switch until you find the problem.
  8. R

    2007 GMC 3500 HD No crank No start

    You should have power on pin #71 of the relay (refer to wiring diagram post #6) with the key in the start position. Start checking upstream until you find the problem. When you 'jump out the relay' where are you getting your power source from?
  9. R

    2007 GMC 3500 HD No crank No start

    See attached: Might want to start at the start relay. See if you have power and ground on the control side and the appropriate response on the load side. Pull the starter fuse and check it carefully Make sure there is no corrosion and that it fits tightly in the fuse holder
  10. R

    LMM Whine during acceleration

    One option would be to remove the serpentine belt and see if the noise persists. If it goes away, you know it is on the front of the engine attached to the belt. Alternator. idlers, compressor, etc.
  11. R

    FUEL RETURN LINES

    I don't think I completely understand your question. The fuel return line goes to the fuel cooler, and then back into the tank.
  12. R

    Vehicle to trailer plug harness part no.

    Get your VIN# andtgo to a GM-based parts lookup site, such as GMPARTSGIANT and find the part you want.
  13. R

    Where Does the Dipstick end up?

    Thank you. I was hoping there would be a very easy way to extract more of the 'old' oil. Makes the job a little harder because of this position.
  14. R

    Where Does the Dipstick end up?

    The question is, "When the dipstick goes into the pan area, does it go into the front section of the pan (in front of the hump in the pan) where the oil will not drain out during an oil change, or into the rear section where the oil would drain out??"
  15. R

    Lml Duramax 230 ect towing

    232 is just fine a long as your fan eventually locks up and cools down the engine.
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