2007 Chevrolet Silverado 3500 HD V8 6.6L High Output Alternator JS Alternators This is a direct fit

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battery negative to frame/body and engine ground to frame body PLUS we add the leads to the starter and the fuse relay box

2007 Chevrolet Silverado 3500 HD V8 6.6L High Output Alternator JS Alternators This is a direct fitFitment: This is a direct fit high output alternator for the 2007 Chevrolet Silverado 3500 HD 6. 6L. Being a direct fit, this alternator fits directly into your stock alternator location. Plug: This high output alternator comes with a factory style plug so that your OEM plug will plug directly into the alternator. Therefore, with an OEM style regulator, it will have a factory voltage set point. NOTE: If you require charging at a certain voltage