Question about 2006 GMC Yukon

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2006 gmc yukon back door/hatch won't unlock

The door and window will not unlock from the key fob. there is no visible way to unlock them from the vehicle, they don't unlock when I push the unlock button inside.

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Check battery voltage. if above 13.7 volts move to rear lock actuator and measure battery voltage at actuator if above 13.6
replace actuator if below specs. check grounds and alternator out put as follows, alternator output 13.7 to 14.25 volts. key off battery volts should be 12.90 + - 3/10 of a volt and about the same voltage at the actuator. let me know. kindest regards Bill

Posted on Jan 30, 2009

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