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  1. P

    rough shift 1st to 2nd: fast service learn

    i've recently done a dod delete, and i also did a transmission fluid flush and filter change. the vehicle had the battery disconnected for long periods of time, and i experienced battery problems to the point i had to replace the battery a few days ago. i am experiencing missed/rough shifts from...
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    reset steering angle sensor problem - SOLVED

    i have completed a deep engine repair (failed piston rings), and i am struggling to get past the issues i'm having with the steering system. i had a major misalignment with my steering gear, fixed it, got the steering column lined up properly, adjusted the inner tie rod bolts to set the toe, and...
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    fuel injector voltage probe location

    having recently repaired a failed set of piston rings on 1 cylinder, i'm trying to improve my diagnostic skills and evaluate a hypothesis from @Pressureangle about the corresponding fuel injector having a problem, e.g. opening for too long relative to the other cylinders. i've got a picoscope...
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    steering column out of alignment after removing steering gear

    i'm nearly done with fixing this car, and i now have a steering alignment problem that has come up. with the wheels dead straight, the steering gear knuckle is notably off center, forcing the center mark on the steering wheel bolt 30 degrees to the left. when i have the wheels straight...
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    dtc P06DA: open oil pump solenoid circuit

    after replacing the camshaft and oil pump, i'm getting dtc P06DA, which is an open circuit for the oil pressure control solenoid. since i have the oil pan removed atm, i'm keen to get this dtc resolved prior to closing the oil pan, in case i need access to resolve the matter. to check the...
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    leaking piston rings: seeking advice on process

    i've been on here for the past few months posting about engine trouble with my wife's 2020 tahoe l86 that has 90k miles, and i believe i've narrowed it down to piston rings or similar on cylinder 8. i'm seeking advice on what process i should take when attempting to repair it. i had the engine...
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    l86 dod delete: stalling and inconsistent idle after startup

    i've completed the mechanical work for a dod delete on my 2020 l86, and i'm having issues with inconsistent idle and stalling after starting the car up. i have used hp tuners to download ecm, flip dod setting to disabled, and written the modified image back to ecm. here is a summary of what...
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    2020 with 10L80 transmission: how to fill fluid?

    i'm almost ready to test my dod delete work, and i need to refill my transmission fluid. i have 12 qts of dexron ulv on hand and another 5 qts ordered. i had the radiator/cooler disconnected and drained the transmission fluid from the pan and replaced the filter. i had to undo the 8 mm hex...
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    front differrential: trouble reinstalling wheel flange bolts

    when i removed the bolts connecting the wheel flanges to the front differential, i recall thinking "wow, these are annoying to remove, i wonder how i'm supposed to torque them to spec on reinstall?". the time has arrived and i have spent 60ish minutes searching to no avail to find the trick to...
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    front crossmember bolts: TTY and part number

    i recently dropped my oil pan as part of a dod delete, and i'm in the process of reinstalling the parts i had to remove to get it out, which includes the front crossmember. i am following the service manual and see that the 4 bolts that secure this crossmember are supposed to be installed at 52...
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    gmpartsdirect.com: cancel order and chargeback or wait for order to be completed?

    on december 30th, i placed an order for $930 worth of parts, so i could complete my dod delete work. prior to ordering, i inquired about the estimated lead time for these parts, and i was told 4-5 business days for special order parts to arrive from gm before they are aggregated and shipped to...
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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 - SOLVED

    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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    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'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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