Wheres tach on 02 trailblazer

Where is the tach wire located on a 02 trailblazer? I spent some time under the hood looking for the white wire comming form a "blue plug on passengers side"  from what im told, but couldn't find it.2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

Driver's side of motor... blue plug.... only white wire. Gus Wherever I go, that is where I end up......

Thanks alot guys, i figured it may have been that plug but both my wire diagrams said passengers side.  Appreciate your help!2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

White wire at instrument cluster. At least it is on the 2005 I just did.

JWorm where is the "instrument cluster" located?

tbird2340 wrote: JWorm where is the "instrument cluster" located?

Im sorry but LMAO!

Glad I can amuse you.

2002-2006: Below the ignition wires, there's another harness that runs horizontally. This harness has many white wires, of three different sizes. --Medium-sized white wire is brake. --Small gray/black is negative parking lights. --One of the small white wires is tach. There are several small white wires......and one of them also happens to be what looks to me like a data wire; it is a rapidly pulsing ground. So, when testing for tach, make sure that not only to you get AC voltage with the car running, but that it varies when revving the engine.