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GMC Truck
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2009
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Envoy 4WD L6-4.2L
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Repair and Diagnosis
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Maintenance
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Service Intervals
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Normal Service
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50000 MI or 80000 KM
50000 MI or 80000 KM
Replace
Fluid - Transfer Case
Automatic Transfer Case Only: Change automatic transfer case fluid. Check vent hose at transfer case for kinks and proper installation.