GREASE
Well...you can either use the recommended ATF (Hyundai SPIII) or you can substitute it for Amsoil Synthetic ATF http://www.amsoil.com/catalog.aspx?code=ATFQT-EA <-- Amsoil ATF For 2001 Hyundai Tiburon for Hyundai SPIII, Go to a Hyundai Dealer.
dot 3 brake fluid the blue one
If your transmission is automatic then use castrol multi vehicle import
The answer is use 10W-30 for engine oil in the 2003 Hyundai Tiburon GT.
R-134
5w20...use synthetic
Try to use the Hyundai Tiburon speaker adapters plugs so you don't need to cut wires and mess up the electric system, you can get those from eBay or amazon.
No, Pontiac G6 rims will not fit on a Hyundai Tiburon. Other Hyundai and some Kia, Mitsubishi and Volvos use that pattern with a 67.1 hub bore.
== == Use ONLY the fluid that is recommended by the car maker. They designed it so you should follow their instructions carefully.
10W/30
use your key and reprogram your remote from the dealership