[sosilboy]

What are the disadvantages of leaving the hubs locked on you sierra and driving around in 2WD so you dont have to get out of the car to put in 4WD?

And is it damaging to drive around town in 4H?

[steve]

engaging the hubs means all the drive train components will be turning, even if you are in 2wd. that might cause unnecessary wear.

same as if you drive in 4H around town. If the road is dry and you have good grip front and rear you'll be causing unnecessary wear on all drive train components, front and rear because the front and rear will be fighting each other.

that's how i see it anyway.