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  1. W

    4L80E Tranny issues

    I am new to this site, Please excuse me as I'm not sure what I am doing. I recently purchased a 94 GMC Sierra K2500 Pickup. 6.5 turbo with a 4L80E tranny. I lost Overdrive, and received codes 15 and 81, (coolant temp sensor and 2-3 shift solenoid) I replaced coolant temp sensor and all shift...
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