I have a 2003 Chevy 2500hd Duramax, lifted chipped all the good stuff. My cousin wants to trade me a 2003 g35 coupe has loads done to it. Is there any common problems with these cars i should be aware of? Also he said it has a stillen stage 4 supercharger on it but i have yet to be able to find one of these for this year, do they even exist? I know they make a stage 4 kit but cant find it for the 03. Thanks

 

03 and 04 are known to have manual transmission problems, defective synco for 3rd and 5th gear. it also have common G35 problem of power door lock, power window, power seat, cd player, clicking rear axle.

 

Great answer RiversideS13, only other thing I would add was some people complained of pre-mature wear on the Brembo OEM brake pads and rotors.

 

Stage Descriptions:

Stage 1 – Entry level, no intercooler. Not 50 state legal. Intercooler can be added later.
Stage 2 – Intercooled, 50 state legal, optional engine warranty available. Our most popular configuration.
Stage 3 – Intercooled, higher boost pulley, not 50 state legal, no engine warranty available. High power with minimal risk.
Stage 4 – Intercooled, highest boost pulley, remapped black box, larger injector, high capacity fuel pump. Available only as kit for existing Stage 2 or 3 unit. Not 50 state legal, no engine warranty available.