My downhill descent light along with tc and abs are on my disc 2

Your abs and traction control lights should only come on when you start to slide while breaking(ABS), and when your wheels spin in place when excelerating(TC). If those 2 things don't happen, which with some people they never do, you should never see the lights come on. Only when those mechanisms are in use do the lights come on. And they will always flicker as that is what abs and tc are, intermitant surges to break up the constant. ABS does this for obvious reasons...anti lock break, so when you slide, the abs "taps" the breaks in short bursts so they don't lock up. TC "taps" the exclelrator when it slips. Those "taps" are what trigger the lights on your dash, which is why they flicker and don't stay on.

It is possible all problems are caused by a common problem, but in order to sort this out, you need to look at trouble codes with a code reader.

go to dealer to plug the testbook in

Your ABS system has detected a fault in the system. When that happens, the TC is automatically turned off. You will have to have the ABS diagnosed and repaired before the TC will come on again.
Good luck.

i have same probleme with my land rover, this trouble is intermitant wath can i do abs light traction control andhill descent if you have he ansher for me [email protected] thank you

No you will not "harm" the vehicle.

1. The ABS fault light will mean that the anti - lock braking facility is not working. However the conventional braking system will continue to operate. Bear in mind that you now have no system that prevents you from locking up your brakes so it is all down to the driver.

2. Traction control (TC) warning. The TC function will not be working or not working as programmed. There should be a TC on/off switch or button in the vehicle. Make sure you manually disable the TC by switching the TC OFF until the problem is identified and rectified.
TC is a useful driver aid, especially in slippery road surface conditions, so take extra precautions when driving without it.

Even in good conditions the Tahoe is not a vehicle that handles well.

3. You should get the vehicle checked for the ABS and TC problem. It may only be some faulty sensors that require replacing but a proper diagnosis needs to be made.

first check the abs sensors wiring and connections if good than have the truck scanned most auto stores such as auto zone/advanced auto will scan vehicle for free check ur local area the trouble code will narrow down ur problem so it can be repaired

Read my post on landrover enthusiast comes under abs last resort lozzzz

Ok, you either have an expensive problem, or a very cheap one. And it all depends upon the number of lights on the dash.
If you have ABS and TC showing, then you may just have a diff-lock switch fault (and an intermittent H shaped amber light also which is the diff-lock indicator). This is a software issue with the SLABS ECU and is showing that due to diff-lock the ABS and TC are in a lower response setting. Later trucks don't have this problem (03 model year onwards) as the software was updated. The diff lock switch is about £12, and it's a bugger of a job. It can be done from underneath the vehicle (did mine this way) or from the cabin, and the switch is p/no PRC2911, and just unscrews. It's located just behind the diff-lock stud above where the front prop fits.
Your options are thus:
1) Remove the front prop. Work blind and try and change it by feel alone. Helps if you can clean the area off before too, don't want any rubbish falling in the box! Unplug & Undo the switch, IIRC it's a 12mm head, and a stubby spanner is the tool for the job. Remove, swap the lower nut from the old switch to the new one (important for the length) and put back in. Don't do up too tight, or it may shear off (as my friend did 2 days after I did mine! He kept tightening it...) Pop the connections on and the front prop and the fault should go away. You could also just disconnect the switch if you want. IIRC open circuit is no-diff lock anyway, but if that's not correct then make up a link with some spade connectors and link it out then.
2) Remove the centre console, drill the rivets and attack from above. Same tools needed, just you can see what you're doing.
I favoured Option 1. YMMV!

If however you have ABS, TC and Hill Descent (little picture of a truck going downhill) then you sadly have an ABS issue which suggests either Wheel Bearing, ABS Sensor Fault, or Shuttle valve. Best to get it to a dealer and on the computer for them to diagnose what exactly is wrong.