Highway Hypnosis
Always be alert and pay attention to your surroundings while driving.
If you become tired or sleepy, find a safe place to park the vehicle and rest.
Other driving tips include:
• Keep the vehicle well ventilated.
• Keep the interior temperature cool.
• Keep your eyes moving — scan the road ahead and to the sides.
• Check the rearview mirror and vehicle instruments often.
See also:
Customer Assistance Offices (U.S. and Canada)
GMC encourages customers to call the toll-free number for assistance.
However, if a customer wishes to write or e-mail GMC, the letter should be addressed to:
United States
GMC Customer Assistance ...
Rear Vision Camera Error Messages
Service Rear Vision Camera System: This message can display when the system is not receiving information it requires from other vehicle systems.
If any other problem occurs or if a problem persists, ...
How to Check Lubricant
2500HD with 6.0 L
All Other Series and Engines
To get an accurate reading, the vehicle should be on a level surface.
• For all 4.3 L, 4.8 L and 5.3 L 1500 Series applications, the proper leve ...





