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Banned
2004 gmc
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26,181 Posts
Some early 2002-2003 TCCMs were simply bad, and have to be replaced when they fail. Swap with somebody if you have any trailvoy-owning friends before you buy one. Then look on Ebay.
 

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Banned
2004 gmc
Joined
·
26,181 Posts
It's mounted on a panel above the driver's left knee. Here's a pic of mine with the dashboard out. As far as I know, all years are backwards compatible - buy the newest one you can find for a good price. Strangely, I don't see any on Ebay at the moment.

 
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