Question about 2003 Chevrolet Silverado 2500HD

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Trying to find where a ground wire connects to

Under hood on firewall, next to brake booster, there are 2 ground wires, does 1 wire go to the master cylinder bolt, right now its hanging from firewall, the length of the wire is less than 24" long. the vehicle is a 2003 chevy silverado 2500 hd with the 6.0

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  • scott736 Jan 07, 2009

    thank you thundergod i figured it out , it was the ground for the hood, or the lamp under hood

    thanks

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  • Chevrolet Master
  • 6,982 Answers

Wire could go to rear of cylinder head. Going from the firewall to the master cylinder really does not make much sense as that assembly is bolted to the firewall and is grounded there. Generally most systems have multiple ground points, which is why you likely don't have any problems other than finding a home for that wire. On lots of vehicles I've owned, when there was a question about reliable grounding, I ran a 12ga or heavier wire from the battery to engine, firewall, dash and fenders, independent of all factory grounds. It's overkill, but I've never had a ground problem either!

Posted on Jan 07, 2009

  • Richard Scordino Jan 07, 2009

    OK that makes sense. Though the light is usually grounded through the hinges as well. Glad to hear that you found it!!

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See Figures 1 and 2
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12_11_2011_8_48_59_pm.gif

Fig. Fig 1: Common power brake booster attachment


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12_11_2011_8_52_07_pm.gif

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