When I hook up a code reader to the ob port I don't get a power reading

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Fuse diagram silverado chevy wiring box trailblazer 1500 2005 gmc panel 2500 chevrolet 2006 2500hd stereo van avalanche fuel pump Fuel pump problems: question: i have 97 chevy silverado 2 wheel When i hook up a code reader to the ob port i don't get a power reading

Fuel Pump Problems: Question: I Have 97 Chevy Silverado 2 Wheel

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30 2002 Gmc Sierra 1500 Fuse Box Diagram - Wiring Database 2020
30 2002 Gmc Sierra 1500 Fuse Box Diagram - Wiring Database 2020

Fuel Pump Problems: Question: I Have 97 Chevy Silverado 2 Wheel
Fuel Pump Problems: Question: I Have 97 Chevy Silverado 2 Wheel

When I hook up a code reader to the ob port I don't get a power reading
When I hook up a code reader to the ob port I don't get a power reading