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Old 11-13-2014, 12:41 PM   #6
gmclowsierra
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Join Date: Mar 2008
Location: williamsport,pa
Posts: 329
Re: Power back tailgate glass problem

the motor is grounded to the transmission and thus thru the tailgate. you only have to put power to one side of the motor to get it to go up.if the wires are not there then you don't have to worry about the safety switch. what cable are you talking about. I have a 78 and there is no cable in there.
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