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  1. K

    Did 2007 Denalis have AFM in the 6.2 ?

    Maybe if you max out the oil intervals, use marginal oil, and a cheap filter, you increase the odds (or rather the time until) of it failing, but it’s an electro/mechanical system—it IS going to fail eventually.
  2. K

    Hot negative battery post and no power

    If you’re worried about something burning up in the meantime, disconnect the battery
  3. K

    Vehicle Won't Shift Into Park or Reverse, Gunky Shifter

    Cable need lube or it’s kinked somewhere
  4. K

    2007 Yukon Denali stalling

    Did you use AC Delco parts or TrakAdvanceAutoZone?
  5. K

    2003 yukon 5.3l flex fuel lifter noise and code misfire PO300 235,000 miles

    The valley cover bolts directly to the block, no connection to the heads. The heads have locating dowels to properly align. The head torque sequence has you torque to a certain number of foot pounds, then you use a torque angle gauge to get to the final torque, but some daring individuals like...
  6. K

    2007 Yukon Denali stalling

    Scan for codes and troubleshoot
  7. K

    2003 yukon 5.3l flex fuel lifter noise and code misfire PO300 235,000 miles

    Oh, and the only ‘special’ tool you’ll need is to remove the fuel line. And you don’t need to remove the valley pan to change the lifters, but you might want to and change the knock sensors while you’re in there. AC Delco parts made it this far—don’t cheap out on parts store knock sensors or...
  8. K

    2003 yukon 5.3l flex fuel lifter noise and code misfire PO300 235,000 miles

    You will need to remove the heads if you need to change lifters, it do the diagnostics you described first—remove the valve covers and check for play in any other rockets, crank it over and see that all rockers are moving, etc. What are your oil change intervals, how long since last oil...
  9. K

    P015B Check engine Code

    P015B is bank 1 sensor 1–pre-cat. The cat not functioning would reflect on sensor 2.
  10. K

    E85 experience

    okay i’ll Send you my shipping address
  11. K

    Sparks and plugs, direction!

    I’ve heard there’s some “AC Delco” stuff available online that’s not actually AC Delco. I’m not sure how you would differentiate other than to buy from a reputable seller. If you re-use the metal heat shields there should be no issues with melting wires
  12. K

    E85 experience

    Fuel costs in the US depend on region. I live in Oklahoma City where E85 costs $2.29/gallon, E10 around $2.45, and pure gasoline around $2.65
  13. K

    Sparks and plugs, direction!

    AC Delco
  14. K

    2001 Chevy Tahoe LS Cutting off turns over but then will start in a few mins also if I shake harness

    If it runs rough until warmed up, a very likely culprit is the intake manifold gasket. Change the knock sensors and their wiring harness while you’re in there also. May not solve all your problems, but very likely will solve one
  15. K

    Evap Code P0449

    Did you put an AC Delco part in there or something from autozone or equivalent?
  16. K

    P0532-00, No A/C with flashing snowflake

    Check the sensor for 5V and ground at the appropriate pins and if it’s there, check for the signal out. I’m guessing it probably goes to the BCM, but I might be wrong
  17. K

    2002 Tahoe P0118 code after new coolant sensor

    Where’d you get your sensor—Duralast or Delco?
  18. K

    Loosing oil

    Bell housing is wet where—top, all around, or bottom? Just one side or both?
  19. K

    E85...any reason Not to use it?

    I take a half gallon each from the top and bottom before starting my truck in the morning just to be safe.
  20. K

    Oil Leak?

    If the leak truly tracks all the way up to the spark plug area, it’s not just the rear main. $500 doesn’t seem out of line considering the amount of labor involved. Edit to add: looks like Iamdub types a lot faster than me.
  21. K

    Misfire and no power....

    Also, I just went back and read through and noticed you asked about checking exhaust port temps with the engine warmed up or no. If the engine is warmed up, the manifold can heat soak. You want to check it cold. Each port should heat up at about the same rate. If you have one that doesn’t get...
  22. K

    Misfire and no power....

    When you say the cat con temps are within 15-20 degrees—they’re hotter at the aft end than the front, right? That would indicate they’re working.
  23. K

    Strange transmission problem

    What year is the trans you’re swapping in?
  24. K

    Misfire and no power....

    If you had a dead cylinder on a cold (not warmed up) engine, you’d have an exhaust passage just above room temperature.
  25. K

    Cold start, rough idle, check engine light

    Yours is doing what—running rough until warmed up and now the CEL is on? Or brake and ABS lights? If you have a check engine light, get it scanned for codes and go from there.

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