It needs to be long enough to make sure all the systems work. The engine needs to get warm to check the heater and air conditioner.
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Thursday, May 9th, 2013 AT 5:41 PM
THIS IS MIKE
MECHANIC
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Make sure to drive over different terrain, bumps, hills, tight turns, acceleration and braking. Depending on the problem reported it may take a longer test drive to see the symptoms.