GMC Sierra

Sierra is a 4-door, up to 6-passenger full size pickup.

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How to Check
Use a good quality pocket-type gauge to check tire pressure. Proper tire inflation cannot be determined by looking at the tire. Check the tire inflation pressure when the tires are cold, meaning t ...

Using Softkeys to Control a USB Storage Device or iPod
The five softkeys below the radio display are used to control the functions listed below. To use the softkeys: 1. Press the first or fifth softkey below the radio display to display the functions li ...

Root Directory
The root directory of the disc is treated as a folder. If the root directory has compressed audio files, the directory displays on the radio as the CD label. If a disc contains both uncompressed CD a ...