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Tahoe & SuburbanThe power, space, and brutal towing ability make the Tahoe and its longer sibling, the Suburban, arguably the best full size SUV's on the market today.
That was OBD I days, i.e., 1995 or older. Anyway, the CEL should be lit with key on, engine off. If yours won't start, the CEL is not really a good diagnostic aid.