hello, go to crutchfield.com, go "out fit my car" it will give you sizes and options for new speakers.
The 2000 Chevrolet Tahoe Z 71 rear speakers measure seven inches by four inches. The front speakers measure four inches by three inches.
You don't need factory speakers. Just buy the same size speakers and install.
The front speakers in a 2000 Chevrolet Tahoe are 6 1/2 inches. These are located in the front doors. The rear speakers are located in the rear doors and also measure 6 1/2 inches.
I don't know what size speakers are in the Tahoe. But the Speakers in the Ford Expedition are 6x8 on all the doors. If the sizes are the same they will fit.
Go to Crutchfield.com and they will have all of the sizes of your factory size speakers for your car.
6" x 9"
there are 4 speakers and the size is 6.5
Factory sub is 8"
Ft
6.5" up front in the doors and 5.25" in the rear doors. if yours has the speakers in the rear pillars by the hatch, those are 3".
6 3/4"
Not sure what size the tweeters are, but the mid range speakers in both the front, and rear doors are 6.5"