See another dealer, that one is stupid. No wonder they don't sell any parts.

Half of the dealer countermen are morons and can't scratch their a.s with both
hands. I'd find that pulley in 2 seconds if I had my EDS in front of me now.

If the pulley isn't listed in the respective group #2 (which is the electrical
group for GM), then it will be in an alternator/generator chart by OEM ID #.

GM publishes charts with breakdowns of all the parts for the alternator. All
you have to know is the stamping # from the case and then it can be found in
the chart in the respective year. The pulley is one of the parts listed.

GM generally services EVERY part of the alternator, down to the screws that
hold the case together.

Find another GM dealer with a clue.
Joe--ASE Certified Parts Specialist & 10th Ann.Club Tech Director
'80 Carousel Red Turbo T/A, 27k orig.
'79 "Y89" 400/4 speed 10th Ann. T/A, 57k orig
'84 Olds 88 Royale Bgm 2 dr, 307 "Rocket" (lol), 143k and still going....
'91 S10 Blazer 4.3Z

   Yea I cross referanced the part number. Fits trucks, up to current, back
to the 80's.  Fit's  a few year of 'Vette's, 2.8 W-cars, Vans, Caprice
Classics, J-cars,  no  F-bodies.

   The site I  looked on  doesn't list a pulley for  a 88 or a 92  even.
Yet If I had the part numbers, I could probably  cross referance it.

   One  thing to do is to ask the   guy at the dealer's  parts counter to
look  up the car, with the  engine vin  diget.  Then ask him to go to a
alternator exploded view. Then ask  him  to swivel the monitor so you  can
see it.  Then point  to the pulley and ask   him to pull up the part number.

   If he's an a.s,  walk stright  to the dealer  mangers office, let  him
know. If he's an a.s, file a complaint  with GM. Those parts counters  are
there to sell YOU parts. GM wants you to go  in and purchase parts for your
cars there. Hence the decals "Keep your GM all GM with AC-Delco".
Charles