Parking break wont engage 2001 chevy tahoe

Question edited for clarity.
Question moved to model category.

Video here

https://www.google.com/search?q=1999+Chevy+Silverado.+How+to+adjust+the+shift+cable

..

Who replaced the cable ? sound's like it was not adjusted correctly or not at all .
Range Selector Lever Cable Adjustment
Caution: The automatic transaxle range selector cable is made out of two cable sections. After initial connection never separate the two metal couplings from one another. Integrity of the connection of the two metal couplings will be lost if separation of the two metal couplings occurs. When servicing the transaxle remove the cable at the automatic transaxle range selector lever and at the automatic transaxle range selector cable bracket. If either section of the cable needs to be replaced, replace both of the cable sections. Loss of connection integrity of the two metal couplings can cause loss of transaxle shift control which could result in personal injury.
Notice: Adjust the automatic transaxle range selector cable while the transaxle and while the gear selector are in the Neutral position only. Failure to do so may cause mis-adjustment.
Set the parking brake.
Block the wheels.
Disconnect the shift cables at both ends with the system in Neutral.
Notice: Do NOT attempt to separate the metal couplings. Replace both cable pieces if the metal couplings are separated. Both of the cable section will be damaged if the two metal couplings are disconnected.
Push up to the adjustment position to release the adjuster until the cable housings separate.
Depress the adjuster clip once. This mobilizes the adjuster housing toward the transaxle end fitting.
Line up the end fittings so they slide together until you feel the parts cam together and lock.
Depress the adjuster clip completely. This locks the cable into its adjusted service position.
Pull the conduit in the opposite direction to assure full system adjustment of the shift cable.
Important: The horseshoe clip with the tab is flush when fully engaged.
Ensure the conduit is fully engaged.
The horseshoe clip with the tab is not flush when not fully engaged.
Install the shift cable retainer and the wiring harness clip or wiring harness strap.

need to tighten /adjust the cable line at the one into two connector
How to Adjust Parking Brake in Chevy Silverado Parking Brake Adjustment 1999 2006 2007 2013 Chevrolet Silverado GMC... Adjusting parking brake cable

Sounds like the shifter is stuck in reverse or drive since it will roll.
I would set the parking brake and have someone watch the shift lever on the transmission to see if it and the shifter inside is still connected.

there is adjustment down on the ******. I will send you a picture, what you will need to do it put on the e brake,and block the tires. on the drivers side of the ****** the shift cable is located, pop off the cable from the arm and pull the white clip, when push the arm foward that is park,and then easily pull the cable to the arm and put back the white clip

Adjust the gear shift cable so that the park position sensor will move to the right position then it will crank. Right now it thinks it is engaged in some gear.

No they do not. You adjust the park brake cable under the truck tighter to adjust the parking brake.

The brake shoes need adjusting. Disengage the parking brake.
Before fitting new shoes you should slack off the parking brake cable completely. Locate the adjuster(just follow the parking brake cable. Undo the locknut and slack off the cable.
Remove the rear wheels and drums again. You will find a screw-in type adjuster between the shoes. Turn the adjuster to increase the distance between the shoes. The left and right wheel's adjusters turn in opposite directions to achieve the same result. Fit the drum to see if it slides over the pads easily. Do so until you start having diffyculty sliding the drum over the shoes. Fit the drum and rotate it. You should not hear any scraping or have any resistance on the drum when it is rotated. Refit the wheels. Test the parking brake. If it is still too slack adjust the cable under the car until you when you engage the parking brake it engages fully after 3-5 clicks.

adjust rear brakes cable my need adjusting hope this helps

There is no adjustment........you will have to replace the parking brake.