GnatGoSplat Posted March 28 Report Posted March 28 That's great that the BCM still seems okay. In that case, it probably is an open-collector output and should be fine to bypass it on the relay. Unfortunately, I don't have any knowledge of what these aftermarket scan tools can do. Just something I haven't had to worry about (yet) as my GM cars are older and predate the married BCMs. I'd be interested to know if you find out. I once read there's a Tech 2 clone, but I haven't researched it. I also don't know if you can program modules without access to GM Techlink to download updated firmware and such. If the BCM is giving you other weird issues, probably a good idea to lean towards replacing it. Quote
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