Originally Posted by CarlD
Your 99 is more than likely VPW but you can make sure by hitting MORE> MORE> and seeing what it displays for the MODE.
missed that reply, thanks.
Also, thinking out loud here but if anyone knows:
SG gets all its readings from ECM.
van odometer & speedo are pretty close to accurate with 245/75/16.
Just switched to 265/75/16 for winter and I know the speedo/odo will be off, as will MPG readings on SG.
So, if I reprogram the ecm for the correct tire size the SG will be back to calibrated?
Finally going to get off my wallet and buy the vin license so I can reprogram ecm in van. Hopefully this weekend.