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  1. J

    Which Gear for SC "Foothills"?

    Howdy! I've just moved from very flat, Central Florida — to hilly, Greenville area, South Carolina. I had the automatic transmission rebuilt (twice) and upgraded the transmission radiator/cooler. :) I remember my Florida, transmission mechanic saying something about keeping the Tahoe in 3rd...
  2. J

    Spark Plugs keep fouling & P0172 code

    Brief History: This has been going on for years now. I made a post in 2021 and that helped solve some of the problems I was having! But now I've narrowed down a specific, reoccurring issue: fouling plugs Reoccurring Issue: About twice a month I'll get a P0172 — System Too Rich Bank 1. Rarely...
  3. J

    Tuner to fix shifting in 2000 Tahoe (auto transmission)

    My mechanic recommended I get a "tuner" to fix the weird shifting I'm getting in my 2000 Tahoe. I'm looking for advice on which device, and how to make the settings I need. Issue Details: I had my automatic transmission rebuilt about 6 months ago. It works great 80% of the time. Sometimes it...
  4. J

    WTH is this weird, plastic thimble in Radiator Reservoir Hose?!

    I've had some issues with random overheating in my 2000 Tahoe. You can see the troubleshooting below, but it seems pretty clear, that the coolant is being blocked. I've flushed the radiator multiple time, and I'm still getting rusty, coolant water, with little, tiny brown bits coming out of...
  5. J

    Automatic Transmission - slight surge from 1st to 2nd

    2000 LT 5.3L V8 2WD Tahoe, automatic with 200,000 +/- miles. History: Automatic transmission was completely rebuilt about 6 years ago. About a year ago, the transmission started slipping with some hard shifts. The transmission fluid looked normal (for the age). I removed some transmission...
  6. J

    2000 Tahoe - Idle Issues with A/C vibrations

    2000 LT 5.3L V8 2WD Tahoe, automatic running rough with A/C on. Fixed: Items replaced/cleaned so far: • Spark Plugs (new) • Spark Plug Wires (new) • Coils (all 8, new) • Valve Cover Gaskets (it was fouling the spark plugs) • Cleaned Throttle Body • Cleaned Mass Air Flow Sensor • Cleaned...

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