Special Application Services
• Allison Transmission™ Vehicles Only: Replace external transmission filter at first engine oil change only.
• 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.
• Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/ 3,000 mi.
• Have underbody flushing service performed once a year.
See also:
Reactivation for Subsequent Owners
Push and follow the prompts to speak
to an Advisor as soon as possible after acquiring the vehicle. The Advisor will
update vehicle records and will explain the OnStar service offers and options ...
Head Restraint Adjustment
Do not drive until the head restraints for all occupants are installed and adjusted properly.
To achieve a comfortable seating position, change the seatback recline angle as little as necessary while ...
Adding Equipment to the Airbag-Equipped Vehicle
Q: Is there anything I might add to or change about the vehicle that could keep the airbags from working properly?
A: Yes. If you add things that change your vehicle's frame, bumper system, height, f ...





