As a "by the way", I couldn't resist watching one really short Youtube that was entitled "Remove the Duramax Damper Bolt in 2 Seconds".

He used a 36mm socket and a ~24" 1/2" breaker bar, with the bar wedged behind the alternator pulley, held in place using bungie straps. Then, he got into the driver's seat and bumped the ignition key. The engine loosened the bolt.

This seems more like a "here hold my beer and watch this moment", especially with a naked rear surface of the radiator in the video only inches away. I'd be wary of the engine starting with just a bump of the key.... then the loose tools would wreck the radiator, throw the wrench into a fender, then the windshield, then across the parking lot into your wife's car...