If they're the same as the Toledo which they should be then it is dead easy.
1. Remove the little panel just below the clocks by pulling it out to reveal 2 screws.
2. Remove screws and place in cubbay tray for safe keeping.
3. Hold the oddometer knob and gently pull the clocks out until you can get your hand around the back.
4. Unclip and remove the 2 connectors from rear.
5. Remove clocks from dash fully.
The Glass cover then simply unclips from the rest of the speedo if you need inside.
Hope this helps.
PS - Dont do this with the battery disconnected.
1. Remove the little panel just below the clocks by pulling it out to reveal 2 screws.
2. Remove screws and place in cubbay tray for safe keeping.
3. Hold the oddometer knob and gently pull the clocks out until you can get your hand around the back.
4. Unclip and remove the 2 connectors from rear.
5. Remove clocks from dash fully.
The Glass cover then simply unclips from the rest of the speedo if you need inside.
Hope this helps.
PS - Dont do this with the battery disconnected.
I have removed the clocks a few times now and it doesn't matter if you disconnect the battery or not, you still get the airbag light. 
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