General Liability covers Bodily Injury and/or Property Damage claims not related to an automobile accident. If a claim occurs as a result of something other than an automobile accident, the Commercial Auto policy will not cover it.
General Liability coverage is necessary for most Bodily or Personal Injury or Property Damages for which you and/or your firm may be held accountable other than that liability assumed by a Commercial Automobile Policy.
Note that in addition, most transportation brokers require this coverage.