ok so im curious to ask my friend has the s10 zr2 with a factory locking diff. i have a 2000 gmc jimmy slt and the codes i got from my glove box were gu6 and g80 whats this mean?

 

3.42 gears/limited slip diff. aka a good rearend if you have stock size tires now.

 

I get 17.8mpg on my zr2 at 120-130km/h (74-80mph) on my commute to work, there was some city driving mixed into that measurement.

(the steel toed boots weigh down my gas pedal...)