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  1. RussToy

    Stuck in 4-low

    Hello, I need some help with my Tahoe. She's a 99' 2 door 5.7l w/ 4L60e and the push button NP243. She only has 99,000 miles. I recently swapped in an LS2 w/ 4L70e. Everything bolted up...the LS2 and trans are wired to run on their own. I continued using the 243, which is still wired as it...
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