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  1. Wheels, Tires & Brakes
    I bought a 1991 S10 Blazer a few months ago and found that the ABS unit was unplugged at all three connections. I plugged it back in and it threw the codes 21, 25, 31, 35, 63, and 66. I looked into the problem and ohm tested all wheel speed sensors at the 8 pin connector (mind you I have 4 wheel...
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