Marcre,
You can do this yourself, you just need to buy a service manual, preferable Haynes and have some basic automotive knowledge. I have a 1991 Rodeo myself and really like the vehicle. It has 230,000 miles and keeps going strong. I do all of the maintenance myself and enjoy keeping it going. It's not gonna be long before people start calling it an antique but it still looks very nice, in fact I just installed a 2,000 watt audio system so I'm gonna keep it even longer. It's like the EverReady Battery, it just keeps going and going. I am very impressed with the quality of my Isuzu Rodeo, they built them well back in 91.
<img src="/forums/images/graemlins/cheers.gif" alt="" />
Cheers,