2006 silverado 25oohd 5L80-E wont go in reverse

The reverse wire on the car audio harness for a 2006 Chevrolet Silverado is yellow. If you're connecting an aftermarket stereo, this wire is used to trigger the reverse camera display when you shift into reverse. Make sure to connect it appropriately for your specific installation needs.

There are a few potential causes for the issue you are experiencing with your 2006 Chevy Silverado 1500 4x4 and the 4l60e transmission. Here are a few possibilities:

1. Clogged or dirty transmission filter: If the filter is clogged or dirty, it can cause problems with the transmission, including a loss of reverse gear.
2. Faulty solenoid: The solenoid is responsible for controlling the flow of transmission fluid, which in turn controls the shifting of the gears. If the solenoid is faulty, it can cause problems with shifting, including a loss of reverse gear.
3. Wiring issue: There may be a problem with the wiring that connects the transmission control module (TCM) to the solenoid.
4. Faulty TCM: The TCM is responsible for controlling the transmission, so if it is faulty, it can cause shifting problems.

To diagnose the issue, it is recommended to have a mechanic or dealership technician take a look at the car. They will have the necessary tools and expertise to properly diagnose and repair the problem

What fault codes do you have?

i take it is a automatic check gearbox transmission fluid or the torque converter may be at fault

You need a new , rebuilt, or most likely, a junk yard transfer case. Your lucky that 2 wheel drive still works..

there is no vacuum line for reverse. the transmission uses fluid and silanoids inside for reverse. if reverse isn't working the low/reverse band is blown. you can test it by driving and manually downshifting into 1 and if it downshifts through all gears but wont downshift into 1st (feel the truck slowing down from engine braking) then your band is broken. time for a trans rebuld

Sounds like your u-joists are dry and if they're dry they should be greased or replaced . There also could be a rock or some other object in your rear brake.

I have the same problem, not sure, but I think it is related to my headlight switch. My windshield leaks and the switch has water damage. Check at your trailer light harness to see if you have power there, it runs off a separate circuit/fuse.

Usually reverse is the first gear to go out in these transmissions (auto) probably a 4l60E model transmission Im guessing