Heard a new GMC 1500 pass me by- with the I4/turbo, love the turbo whistle- but no manufacturer has ever had a I4 that I could stomach the sound unless it's muffled to oblivion which this one wasn't. Spec's aside- I don't see the 1500/4 banger combo a success (maybe in a Colorado sized truck). That being said- Toyota I6 or phord v6 turbo's I can get behind. Why couldn't GM build on there 80's Buick turbo tech,,,,,,30 years later I would assume one hell of a engine would be in service.