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  1. R

    Hard to start need to prime system question

    The WIF is always replaced as a part of the fuel filter change because it screws into the bottom of the fuel filter. You either replace your existing WIF with new or use your old one.
  2. R

    Inflation .... whats your thoughts on todays Markets?

    The most profitable way I have found personally to invest is to find the right advisor. They all get paid, one way or the other. Here are the 2 that I pay for, each about $50 per year: Paul Mampilly's Profits Unlimited and The Motley Fool's Stock Advisor. These are the low cost advisory letters...
  3. R

    MAP sensor?? 08 LMM

    FWIW, the stock LMM sensor is Parts InformationOEM Part #Price Manifold Pressure/Vacuum Sensor MAP Sensor 12623671 $144.75 Labor Information
  4. R

    Reduced engine power no CEL or codes

    See post #3. You said your problem started with a different fuel filter. Replace it with a stock filter and see what happens. It may not improve your situation but at least you haven't compounded your problem by having an unknown in the mix.
  5. R

    2003 duramax Allison 1000 p0776 and stuck in 1st gear intermittent

    Check all of your codes here https://www.dtcdecode.com/Chevrolet/P0571
  6. R

    Looking for Engine harness bale connector pinout

    https://www.gmupfitter.com/pdflists/view/6 Look for the ELECTRICAL MANUAL in your year/model of truck.
  7. R

    Brake booster

    To make sure you understand, the power steering pump pumps fluid to BOTH the power steering unit itself, and to the brake booster. So yes, a "bad" brake booster could be caused by a power steering leak (but more likely a low condition in the pump). It should not be leaking at all.
  8. R

    Crank no start, has fuel pressure.

    Check your codes here - likely a wiring issue https://www.dtcdecode.com/Chevrolet/P1500
  9. R

    06 P0193 only after 40 min drive

    See attached. https://www.dtcdecode.com/Chevrolet/P0193
  10. R

    01 LB7 p1271 & p1273 codes

    If the problem is not the pedal or sensor, it might be the circuit. I would go to a place that specializes in diagnostics, not parts changing. Do you know what causes these 2 DTC's??
  11. R

    I have no clue what's going on here?!?

    The ground most likely for your problem would be the EBCM ground which is on the vertical frame member, outside of the main frame rail under the driver's feet. Main battery grounds on side of the block, both sides, near the front. Look for where the battery grounding cable goes to the block...
  12. R

    2002 LB7 Fuel Leak by Cooler

    https://en.wikipedia.org/wiki/AN_thread
  13. R

    Transmission issue

    Some info on P0708 here: https://www.dtcdecode.com/Chevrolet/P0708
  14. R

    Interminent Misfire

    Start by looking here: https://www.dtcdecode.com/Chevrolet/P1232. Most likely, it's electrical, not fuel filter related.
  15. R

    LMM stand alone loss of power no codes

    MAF for most LMM's read 37-40 GM/sec at idle. Mine is just a little over 37. Other people have reported a little higher, depending on other equipment changes, exhaust, etc.
  16. R

    LMM stand alone loss of power no codes

    Reading material attached. https://www.dtcdecode.com/Chevrolet/P0128
  17. R

    LMM P0878

    See attached for testing steps
  18. R

    Need help with a hesitation issue on a 2015 LML.

    You have a lower MAF and (implied) upper MAF?? Or just typo? I hope your MAF replacement was with an OEM, not an aftermarket one. You COULD have a problem with the MAF circuit (or some other circuit affecting fuelling) where there may be a dropout or loss of ground. Also, if you used an ACDELCO...
  19. R

    Brake booster failure cause pedal to the floor?

    Just thinking out loud, if your engine was not running, no power steering pump running, and the truck was moving downhill, your brakes would still work although they would require more foot pressure. You were still pushing on the master cylinder rod and creating braking pressure. I would think...
  20. R

    Remote Start No longer working/Start Issues

    At this point, I would go back to the installing shop and ask them to troubleshoot the problem. I can only GUESS as to what the problem MIGHT be. The shop can actually test the system and see the results. A different poster with an engine code problem found that when his lift pump tap was...
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