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.

 

It's an intergral part of the instrument cluster circuit board.

Allan

 

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.

 

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