Winter is Coming
Time to think about winterizing your Bolt.
A good Tech Tip WINTERIZING YOUR TRUCK including a link back to the Forums for additional tips.
Using an overdrive transmission, the 3.90 will be perfect. The higher gears (3.38 being the only option with the HO33 rear) will leave you with a pretty much unusable 5th gear. If you weren't using the overdrive trans, then the 3.38 would be ok.