Usually around a minute just to make sure the fluids have had a chance to loosen up and flow properly. The Ls1 start around 12-1300 and drops down to 8 or 900 pretty quick. If there is snow or ice to be scraped, then it would be the amount of time it takes to clear it off to see. But I keep it in the garage at night so that helps limit the morning warm up.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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