Join Date: Apr 2002
Location: Dandridge (Near Knoxville), TN, USA
Re: differences between OB computer and speedometer
Originally Posted by waynejones
I just returned from a cross country trip on my 2003 LT. I noticed a couple of things
a) the average speed on the OB after resetting is about 10kph less than the speedometer Which is right? Can either be recalibrated?
b) the L/100km reading somtimes appears 'stuck' and shows a reading that's out to lunch. Way too low.
c) the kms left on the remaining gas seems a bit optimistic. How does it do the calculation?
I tried searching but couldn't find the answers. Maybe somewhere someone has explained it all?
Yes, the speedometer on pre 2005 LT's can be calibrated, many posts here over the years, some with pictures on how to do it. It requires removing the speedometer module from the instrument panel and soldering two jumpers on the printed circuit board, one between the two solder pads labled JB, another between the pads labeled JC. This only affects the speedometer, not the odometer.
There is a procedure for calibrating the BC computer mileage calculation. Right now I do not remember where to find it. I am sure someone will come up with it.
I don't want to achieve immortality through my work...I want to achieve it through not dying.
EX: '01 Black LT, BAT BYKE (Totaled at 110,000 miles)
IBA SS, BB, BBG, 10/10ths.
No bike now, but maybe in the future.