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Originally Posted by Planohummer
got onstar? if so, blue-button them and find out what the DTC('code') is and call dealer-maybe something simple.
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Do not have Onstar, but am thinking I may want to sign up for just that feature.
UPDATE: Called the local GMC dealer with whom I have a good relationship. They say, yes, they can perform warranty work on Hummers and have successfully done so in the past. So I schedule an appt and head on down the road.
And then...the check engine light goes off and truck returns to driving as normal. So, moot point now, but very odd. have started it and turned it off a few times now and the light is not coming back on. Strange.
