I used to have an MSD Dashawk when I had a Trailblazer SS. That unit was nice as you could set warning parameters, so when if your coolant temp reached a certain temp, it would flash and I think make a beeping sound. I think the ultragauge might do that, but it is a feature I wish the scangauge had.
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2005 E350 Chateau - V10 - Agile Offroad 4x4
2012 CTS-V Wagon - For the baby...