We have an 88 Iroc that has some RPO's that we can't find any help would be nice.The codes are: E7Z-YA7-1AY-AO1

 

I've got three out of four:

A01 = Tinted glass - all windows (A02 = Tinted windshield only)

E7Z = Vehicle speed - delete sensor (mechanical speedo got this RPO)

YA7 = ?

1AY = Dealer stock vehicle (1AZ = Customer ordered vehicle)



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Willie

Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
Former Paxton (6-psig): 12.57 @ 111 mph.
Former Paxton (6-psig) & former 50-hp nitrous: 12.04 @ 114 mph.
Current ATI D1SC (Initially 10-psig): Projecting high 11's.
Future ATI D1SC (15-psig): Gotta catch them pesky 26-psig boosted TTA's!!

http://willie.camaro-firebird.org/

1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.