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My mom works at a Chevy dealership and I stopped by to get an oil change (her discout is great). While I was there, I asked the service write-up guy if they do High Idle installs there. He said he never heard of it. He later asked the service mgr about it, which he knew nothing. He looked in his notes to see if there was a bulliten for it, but couldn't find one. As far as he was concerned, anytime you tap into that harness, you would void your warranty, unless he learned otherwise from GM. I told him I would try to get more info if it was approved by GM. Can anyone help me locate a bulliten or something?