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  1. R

    Spit a plug, What to do?

    The inserts to repair the heads are not all the same, aluminum heads have more threads than cast iron heads but both use a 14 mm insert or heli coil If you used the shorter cast iron insert it would explain why the plug & insert blew out, the softer aluminum needs all of those threads to hold...
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    [SOLVED] 2004 Tahoe overheating. New water pump, thermostat, radiator

    Leave that heater hose valve open, you can't block them on an LS The fan clutch should have resistance even when cold, if it spins freely when cold it's bad When you top off the coolant, disconnect the steam port line at the throttle body as you fill to push all the air out, then reconnect it...
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    TPMS question

    Air all 4 tires to 42 psi & see if the warning goes away, if it does it just means the tire psi you've chosen is lower than the ecm setting to warn you If you want to run less or more psi than the current setting in the ECM, you have to change that range; if you don't the ECM will just assume...
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    Help me figure out what to do with this boat anchor

    This is a standard double din in my 2001 yukon, they don't make a kit for this year so I used a generic double din install kit & trimmed the factory bezel & modded the kit to make it work but it fits like factory I had to do this on a 2000 silverado & a 2002 Sierra as well because the easy...
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    4 Corner Water/Steam Ports

    The steam ports in the back are only needed if the engine angle is less than 3 degrees down slope, they do nothing if the drive train is angled down to the rear They also don't prevent overheating, they just prevent hot spots in the combustion chamber due to air pockets where coolant must be...
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    2004 Tahoe Z71 5.3L Reduced Engine Power Issue

    If your ABS light has been on it's possible that whatever caused it to come on (cold solder joints in the brain, bad wheel speed sensor,...) was not something that effects drivability; but over time you have lost functionality of ABS components that will effect drivability For instance the...
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    Is it possible?

    If it uses the corvette style filter/regulator then you replace that with a regular fuel filter, extend the return line up to the engine compartment, get a set of fuel rails off of an 01 with the regulator in the rail, install that rail & hook the return port to the line you ran from the old...
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    Differential damage due to tire tread?

    No, you're not at risk of damaging anything including the differential & no gimmicks are required I would get a new tire guy, nothing wrong with a patch only for a nail hole; you bought a tire for no good reason
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    Misfires on one bank

    My vote is also the O2 sensor Unplug the bank 2 sensor 1 and drive it, if it runs normally you found it; the check engine light will come on but it will run fine if that sensor was sending a false lean If that's it resist the temptation to change them all, new sensors all suck; you might have...
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    Safe jobs from A-I

    I have been testing all the AI's regularly for about a year now, asking questions I already know the answer to regarding auto repair, home maintenance, history, current events; just whatever The accuracy of the answers is atrocious on every subject, it's like Wikipedia in that regard So I...
  11. R

    *fixed*Antifreeze leak present for 3 days gone the next

    Sometimes the internal water pump seal or shaft gets a small flaw in one small area, when it's warm it seals but when you shut it off if those flaws line up then it starts leaking when it cools; a new water pump & coolant will take care of the issue I would but new water pump mounting bolts at...
  12. R

    NO SHIFT, SHERLOCK

    I think what your saying is the physical shift arm on the column won't move out of park, some of the responses seem to think your problem is that you can move the shift arm but the transmission doesn't respond If I'm correct & the issue is they physical arm on the column won't move out of...
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    What is the consensus on replacement engine battery?

    Battery's are like 02 sensors now, I have given up thinking specific brands are "safe" regarding quality; 3 years ago I would have a list of those I trust but every one has burned me enough over the last couple years that I have accepted they all come from the same low quality sources who have...
  14. R

    Rear main seal

    The flex plate bolt holes pass directly through into the crankcase, blow by creates pressure in the crankcase that seeks an outlet which can cause oil leaks through the flex plate bolts They aren't "wet" regarding coolant but they are most definitely a direct passage to the crankcase Blue...
  15. R

    Rear main seal

    For the upper Bellhousing bolts I use a cartoonishly long extension so I am working from behind the transmission When you did the RMS last time did you uses thread sealer on the flex plate bolts? They all are wet holes to the crankcase so they will leak oil if they don't have sealer on the threads
  16. R

    Thoughts on a transmission drop and refill

    Exactly, I always do a complete fluid replacement as well; the voodoo about old fluid retaining clutch material that keeps the trans working is intellectually offensive
  17. R

    05 TAHOE, DRL/FOGS NOT WORKING.

    Exactly, as soon as I know it's been cobbled that's the first place I look when it gets glitchy
  18. R

    05 TAHOE, DRL/FOGS NOT WORKING.

    Wherever the modification was made that moved DRL to the fog light circuit has most likely failed since losing both bulbs at once is not likely Anytime you scab the wiring together, always look there first when troubleshooting The fog light circuit has only one fuse so if you're using that...
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    CAI Cold Air Intake

    The factory air intake is better in almost all cases at providing cool air to the throttle body, these are a gimmick; a useful gimmick if you swap the engine into an older car without a provision for the air intake but they're the equivalent of health nuts taping magnets to their wrists if you...
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    Hello and a question because why not.

    My daughter & son in law have 4 kids, their Yukon XL is the main family car but they also have a Sierra crew cab pickup that they can all fit in if it's needed by folding up the center console & putting the oldest in the front middle with them It's tight but everyone has a seat belt
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    6.2 engine problems

    The rules aren't getting harsher, they are getting rolled WAY BACK under the new EPA Administer Lee Zeldin Much better days are coming for vehicle reliability but I don't think there was time for the 2026 models to reflect major changes; but 2027 will be a remarkable year in much the same way...
  22. R

    Low Oil Pressure

    I also see the sensor advice regularly, but I can't remember anyone ever saying that their consistent readings of oil psi range turned out to be significantly different than when measured with a mechanic gauge It's easy to put a mechanical gauge off the pan so I do it but if the dash gauge is...
  23. R

    P0521 after DOD delete

    Since that code is described as a situation of being either above or below a predicted oil psi, and your pump change has resulted in significantly higher oil psi; it sounds like the system is working as designed The PCM doesn't know you changed the pump and/or blocked the bypass (common in...
  24. R

    Feel like a kid on chrismas

    I didn't say he needed a cam to preserve street manners or to hit his power mark, I said he needed a cam that is ground for the power profile he wants; if he likes the GM truck power profile he can keep using that cam but most people looking for 600 hp want the peak above 5200 RPM My comment...
  25. R

    Feel like a kid on chrismas

    Your trans won't take those numbers, a 4L60E can be built to live at 550 but few shops who claim to know how to do that actually can; so you are looking at a Gearstar replacement transmission built to those numbers and convert it to 4WD as opposed to AWD Then budget for a better differential &...

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