Introduction
This guide will demonstrate how to replace an alternator in any GMC Sierra made from 1999 to 2007. Although the guide will be demonstrated on my 1999 Sierra, you can use the same procedure for any GM truck or SUV that uses a Vortec V8 engine.
What you need
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Using an 8mm wrench, disconnect the negative battery terminal. This is the one on the right (closest to the engine).
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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