If this is the 3.0L quad cam Opel/Saab engine, you will need the special
retainers to pvevent the camshafts from going out of time.
We had timing belt replaced at the dealers for about $600, but it was worth
it as our mechanic friend wouldn't touch this job withour the special
retainers.

Hope this helps you,
David

I have the Saturn shop manual which shows the job very well. Let me first
say that I do most of my own repair work but I looked at what was involved
and let a shop do the timing belt, water pump and serpentine. Just too much
to go wrong on an expensive engine and too many special tools needed to make
it reasonable to do at home.

   Just my $0.02 worth
   Oppie