The procedure I used was as follows:

1. Remove old tensioner & tensioning
rod and serpentine belt.

2. Remove plastic "indicator"/"pointer"
thingymagig from old one. The new
one did not come with one

3. Install "pointer" on new one. Set to
top most mark on new tensioner

4. Install tensioner + rod (through PS
pump bracket) with big clamping bolt.
Hand tighten only.

5. Install serpentine belt per original
routing; this should be "loose" at
this stage

6. Start turning tensioning rod nut...
Slack in belt will start getting taken
up....Continue to tighten until
"pointer" is precisely in the middle of
the 4 notches/marks on the
tensioner side. The belt should be
snug around all pulleys etc...Check
to ensure it is on all pulleys and
lines up correctly.
I used a small mechanic's mirror to
check bottom side of alternator pulley
and the starter....These are way
down there!

7. Now tighten big clamping bolt to
100NM.

__________________
Matt
____________________________
92 400E 128K
99 GMC YUKON 88K