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  1. #1

    Default Can't read codes

    Ok, so I have figured out which code reader/scanner that I need for my 2007 Silverado crew with 4.8 & auto. Now I have to figure out why it will not do anything. I replaced the fuse to the lighter. It was blown. 2 scanners have been tried after replacing the fuse and one did nothing and one lit up but did not establish communication. I can't find anything loose, but don't really know what to check. The truck is stock and runs well. The only electrical work was a brake controller that was simply plugged in a couple of years ago. Any help would be appreciated.

    Joe Tom

  2. #2


    I'm sure you know this, but you have to have the key turned on to use the ALDL port to get the codes.

    99 K 1500 Suburban
    78 Silverado Big 10 w/factory 454
    00 S-10 Blazer
    1976 Trans Am
    1980 Honda CB900 Custom

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