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2014 Chevy Silverado
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Speedometer buffer

Old April 28th, 2013, 6:34 PM
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Default Speedometer buffer

I have a 1989 Silverado K1500, 5 speed. I have the 20" Silverado SS rims from a 2005 Silverado on it. I purchased a buffer to correct the speedometer because with the new wheel/tire combination, it was reading way slow. Anyway now I can't find the buffer in the truck. I know on the early 90s it is behind the glovebox, but not on my 89. Anybody have an idea where it might be located??
Thanks.
Old April 29th, 2013, 6:39 AM
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It's an intergral part of the instrument cluster circuit board.

Allan
Old April 30th, 2013, 6:05 AM
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Default Speedometer buffeer

Thanks, Allen, for your help. I called the company that I had received the buffer from and they told me that it is in the cluster. To calibrate the speedometer, I have to send them my cluster.
Old April 30th, 2013, 9:09 AM
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Yep,

That's kind of a process to recalibrate that speedo. Involves a handful of resistors, soldering them in and systematically blowing the ones that don't comply with the ratio parameter.

Easier to send it in and pay their fee.

Allan
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