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  1. P

    dod delete etc: proper way to get part numbers?

    got the camshaft out and have a few more notes for anyone else doing this: - walking the timing chain off the phaser sprocket is tricky. i burned about 2 hrs in total screwing around with it, but it's a 5-15 min job if you know what you're doing. after watching several videos that weren't...
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    dod delete etc: proper way to get part numbers?

    can't believe i forgot to do this. it worked on the first try. i'm moving again, thank you
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    dod delete etc: proper way to get part numbers?

    i've got a 40 in breaker with 3/4 drive (largest i could find on amazon) coming today, so i will give that a try once it arrives. even with a 40 in lever, i wouldn't expect to be able to match the torque from my current battery impact wrench. i spoke to a mechanic that works at a shop that does...
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    dod delete etc: proper way to get part numbers?

    i'm having a real tough time getting this balancer bolt loose. i've got the flywheel holding tool installed, so the crankshaft doesn't move. i have a dewalt dcf900 impact wrench, with a claimed max breaking torque of 1400 ft-lbs, and i managed to crack the 24 mm deep socket after a few...
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    2020 6.2L: misfires, lifter issues and engine replacement

    as a result of these lifter problems, i decided to do a dod delete myself, which would give me an opportunity to observe and clean the top of the engine. after taking off the lifter covers, i found no visible sludge. could it be cleaner? sure, but no sludge. i will cut open my 2 filters from...
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    dod delete etc: proper way to get part numbers?

    i'm most of the way through the disassembly process at this point, and i've got some notes after following the video. my plan is to note the part numbers once the disassembly is complete and then order replacements. i appreciate the cue to check gmpartsdirect, very helpful. definitely drain...
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    dod delete etc: proper way to get part numbers?

    i'm in the planning stage of doing a dod delete, and i want to replace several other engine components as part of the process, per this yt video. a generic issue i have is that i don't know the proper way to get a list of oem part numbers. i have the service and repair manual for this 2020 6.2L...
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    2020 6.2L: misfires, lifter issues and engine replacement

    another round of 1/2 qt seafoam got the lifter unstuck again, and after 400-500 mi without it sticking again, it's throwing CEL again. i will try another round of seafoam shortly.
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    2020 6.2L: misfires, lifter issues and engine replacement

    i will give the seafoam another shot. i've got an extractor, so i'll just pull a bit of oil via the dip stick tube and add in the seafoam. do you recommend the same amount (1/2 qt) as before? i'm leaning towards doing the dod delete mod myself at some point in the near future. nearer if i...
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    2020 6.2L: misfires, lifter issues and engine replacement

    bad news - i changed the oil + seafoam out for plain oil and it went right back to misfiring after the change. does this allow me to infer anything, e.g. that it is indeed a stuck lifter and not a broken valve spring?
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    2020 6.2L: misfires, lifter issues and engine replacement

    yep, running with fresh oil and filter with 1/2 qt seafoam, per your recommendation. qualitatively, the check engine light has remained off and the car idles and drives like it did before the problem started. i will be changing the oil and filter again a bit later today. iirc, MDI2 is the GM...
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    2020 6.2L: misfires, lifter issues and engine replacement

    the car is driving more or less how it used to immediately after the oil and filter change, with the check engine light having not come back on (yet). qualitatively, the engine is no longer vibrating / shuddering the way it was when i drove it home from the dealership. however, i did use my scan...
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    2020 6.2L: misfires, lifter issues and engine replacement

    the wife didn't want to get the car on friday or saturday, so i got it today. changing oil and filter rn, will report after doing the break in procedure you recommended.
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    2020 6.2L: misfires, lifter issues and engine replacement

    should have car back tomorrow, and i am planning on running compression and leakdown tests and having a look under valve covers to localize the problem. with that in mind, i have a few detail questions re your advice. 2 - am i right to assume that i should leave some space for the sea foam...
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    2020 6.2L: misfires, lifter issues and engine replacement

    just spoke to the service rep and was told that the 6.2 L engine is on backorder from GM, with no estimated lead time. he told me it would take about a week to swap the engine out once they had the engine, but it could be 1 week or a couple months until the engine was available. given that it...
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    2020 6.2L: misfires, lifter issues and engine replacement

    after having a look on youtube, i found a video that i think is pretty informative in the context of my current problem. if a lifter fails or gets stuck, it can damage the corresponding lobe on the camshaft, which requires replacing the camshaft. the video works out the cost of the replacement...
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    2020 6.2L: misfires, lifter issues and engine replacement

    ok, so everyone shows up to tell me i'm an idiot for not changing the filter often enough. i will be changing the oil filter with the oil from now on. my wife put a lot of miles on this car, so the oil filter has been changed at least once a year, albeit not at every oil change. what about what...
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    2020 6.2L: misfires, lifter issues and engine replacement

    K&N. i was just going off the packaging that said they were good for 20k mi. if the service interval should be every oil change, that's easy enough to adapt to in the future. i'm really surprised at the amount of crap i'm catching for not changing the filter more often. my recollection of...
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    2020 6.2L: misfires, lifter issues and engine replacement

    my wife's 2020 tahoe started giving episodic check engine lights and had a rough idle a couple weeks ago. i do basic maintenance on this car and change the oil every 5k mi and oil filter every 20k mi. engine oil level looked fine, and when i used a scan tool (launch x431) it didn't show any...
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    2020 tahoe 6.2L 4x4: fluid changes and drivetrain components

    do you know the service intervals for the front differential, transfer case, rear differential, and the transmission fluid + filter? i've searched some online and in the service manual, but i don't see anything authoritative. i've gotten the front differential fluid changed and the pinion gear...
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    always do ABS automated bleed vs normal bleed?

    that was my read: it's an easy way to rule out any issues with fluid in the abs system while also completing a normal bleed.
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    Onstar whole system delete?

    this is a very common pattern: telling people that feature X is for their "safety", when in reality it is done to surveil and control them. other related examples: Find My feature on the iphone sends continuous gps coordinate data to apple, intel "anti theft" allows large organizations to...
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    always do ABS automated bleed vs normal bleed?

    the wife's 2020 tahoe recently had a pretty bad brake failure: the front drivers caliper slide pin bolt came loose, caliper rotated up, piston pushed itself out, brake fluid all over. i took the caliper off, removed dust boot, reseated piston, and reinstalled caliper. after putting everything...
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    2020 tahoe 6.2L 4x4: fluid changes and drivetrain components

    i'm having trouble finding the correct parts for the 10L80 transmission filter and gasket and the 12-bolt rear differential gasket. can you give me advice on how to go about finding the correct parts? search engines, amazon, and other parts stores give mixed results that don't inspire confidence.
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    2020 tahoe 6.2L 4x4: fluid changes and drivetrain components

    i've recently taken over maintaining our family 2020 tahoe 6.2L 4x4 premier with 72k miles, and i am preparing to repair a leaking front differential pinion gear seal and change the fluids on the transmission, differentials and transfer case. however, i am having trouble nailing down exactly...

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