5W-30
5w 30
Depends on your climate. Check your drivers manual.
Dexron-III
what type of gear oil to use in 2003 chevy tahoe 4wd
It is listed in your owners manual. If you don't have one call a Chevy dealer.
5w30
Yes, they're identical.
Chevy does not use inertia switches.
5w30 only
PF46 if 5.3.
Dexcool is recommended.