GMC Sierra Owners Manuals
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New Vehicle Break-In
Notice: The vehicle does not need an elaborate break-in. But it will perform better in the long run if you follow these guidelines:
• Keep the vehicle speed at 88 km/h (55 mph) or less for the firs ...
Tire Rotation and Required Services Every 12 000 km/ 7,500 mi
Rotate the tires, if recommended for the vehicle, and perform the following services.
See Tire Rotation on page 10‑57.
○ Check engine oil level and oil life percentage. If needed, chang ...
Daytime Running Lamps (DRL)
Daytime Running Lamps (DRL) system makes the low-beam headlamps come on at a
reduced brightness in daylight when the following conditions are met:
○ The ignition is on.
○ The exterior ...





