You don't need to remove the pulley to replace The sensor...it makes it a lot easier once its off...but getting that pulley off was the biggest PITA I have ever encountered while working on my GTP...(Well, the bolt)
_________________________
COMPETITION CAMSHAFT STAGE 2, 105 lb Valve springs, new Pushrods, new retainers, 4" Fenderwell Intake, 3" DP with High-flow Cat, Borla Cat-Back, 3.2" Pulley, Shift Kit, 160 T-stat, DHP PCM 1.0, Tranny Cooler, Taylor Wires, Colder Plugs