Quote Originally Posted by GasGuzzler View Post
Opti-crap possibly. There is also a fail-prone wire harness to the OS. It's like 4 or 5 wires and maybe a foot long and is $200 from GM.

If I remember right that pigtail (runs from a connection near the TB down to the opti) was only like $25 when I swapped a '94 LT1 into a '95 Z28 a few years back.

But I would still double check that the pump whines when the key is turned to run, and then check the fuel pressure at the rail... My dad tought me to check the simple stuff first.