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Gmc Sierra - Compass

Suggested by: Da G, 22 Dec 2006 | Print version

1. Start the engine.
2. As soon as the engine is started, the compass in the rearview mirror will show the directional degrees that you are facing. Then it will switch back to the directional letters (i.e. N).

Only works with a 1999 GMC Sierra. This is used to adjust the compass.

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