Welcome to the forum. You should be able to confirm the towing setup in the owners manual. You will want the steering wheel NOT in the lock position. Generally, this means turning the ignition key to Off, not lock. If you notice power on to accessories, you will have to remove 1 or more fuses. GM manuals usually give information about towing 4 flat including what fuses to remove. If you do not pull fuses, you risk having a dead battery at your destination. Last resort if no in fo in the manual,would be to talk to a former Hummer dealer.
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