GMC Sierra Owners Manual

Special Application Services
Service and Maintenance / Special Application Services

Х Allison TransmissionЩ Vehicles Only: Replace external transmission filter at first engine oil change only.
Х Vehicles with Dual Wheels: Check dual wheel nut torque at 160 km/100 mi, 1 600 km/ 1,000 mi and 9 700 km/6,000 mi.
Х Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/ 3,000 mi.
Х Have underbody flushing service performed once a year.


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