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I've been looking at this diagram to try and understand what's what under my hood, and I'm not sure what "GB-1" and "GB-2" and so on are referring to.

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What vehicle is it, year, model, engine size. It looks like a Suburu. –  Allan Osborne Nov 26 '13 at 21:30
    
Wow, good call. Subaru Legacy '97. 2200. –  Aerovistae Nov 26 '13 at 21:38
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@Aerovistae, he's cheating - the Subaru owners in the audience know that they all look the same under the hood ;-) –  Bob Cross Nov 26 '13 at 22:46
    
I drive a 2 litre Ford Focus, just like the wife suggested. Its the brother-in-law who has a Subaru:-) –  Allan Osborne Nov 27 '13 at 18:07

2 Answers 2

It is a ground, and as Digital Lightcraft "Ground Bolt" sounds reasonable. The picture below show another view from the same car. You can see from the picture that it is indeed a terminal that's bolted to the chassis.

enter image description here

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Interesting though, one is called GB-7 while the other is simply GR... –  Larry Nov 27 '13 at 14:00

Hard to say without knowing the car, but based on previous experience, its likely to be "Ground Bolt"

IE ground / earth (-) for the electrical system to the chassis/shell/monocoque

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They are in fact on the chassis, I was going for the same guess. –  PedroC88 Nov 26 '13 at 21:54

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