Location of wiper motor 2004 tahoe - 2004 Chevrolet Tahoe

SOURCE: rear wiper assembly 2004 tahoe

sounds like the ground on the rear wiper motor isn't making a good ground contact , check the wiring see if its connected properly.

SOURCE: 2004 chevy tahoe front wiper motor

You will have to remove wiper arms then the cowl cover.Should be visible from there.

SOURCE: wiper motor replacement on 2004 tahoe

You need to remove your wiper arms and take off the plastic cowl panel.

SOURCE: 2004 tahoe rear wiper motor works when you push

fuse

SOURCE: My Windshield wipers and fluid will not turn off

the relay that runs the motor