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2002 Chevrolet Silverado 5.3L, where on the truck is the Powertrain Control Module?

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2002 Chevrolet Silverado 5.3L, where on the truck is the Powertrain Control Module?

Vehicle: 2002 Chevrolet Silverado 5.3L

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It is near the battery, disconnect the battery first. There is a single bolt on the PCM. see picture below 

 

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Code P1258 came up the truck is a 2003 Chevrolet Silverado 5.3L
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