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When it comes time to replace your worn-out or failed 4WD differential actuator, look no further than United States Powertrain. These replacement front axle actuators are ORIGINAL OEM, for the trouble-free engagement of your 4WD system. Fits many models with 7.25, 8.25 and 9.25 front differentials. fits:1997-2013 GM 8.25 and GM 9.25 IFS front differentials 1988-2013 GM 8.25 and GM 9.25 IFS front differentials

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