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p1638
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  1. Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)
    Im wondering if anyone has any solutions to the P1638 code on a 2002 Tahoe. My battery light keeps flashing at random intervals ever since my alternator went out and every once in awhile it will go into a sort of limp mode and wont accelerate above 2,000 RPM. It is the only code it throws and I...
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