tahoe03

i will start off with i bought a 2003 Chevrolet Tahoe Z71 with a fabtech 6in lift with 35x20 rims. i bought for a steal at $3500 it has been in several wrecks.
it has the 5.3. i have already replaced the brakes on all 4 tires, both belts, cleaned the evap vent, unclogged the rear ac vent tube, replaced the blenddoor on the rear ac system, replaced both ujoints on the rear driveshaft.
i went to the parts store and had them pull my engine codes the first time i had over 44 codes.
i had them cleared and went back 2 days later to see what codes came back i had 35 come back several codes had come back in multiples.
it seems that alot of them are connected in one way or another and i would like to get some opinions on how to repair and some input on what you guys think.
1. C0226- left front speed sensor
2. C0227- left front speed sensor
3. C0225- left front speed sensor
4. C0222- right front speed sensor
5. C0221- right front speed sensor
6. U1000- loss of comm
7. C0300- 02 sensor
8. C0305- tccm reprogram?
9. C0374- tccm reprogram?
10. C0306- transfer case motor?
11. C0321- transfer case motor?
12. C0327- transfer case shift motor/ encoder?
13. C0359- low range?
14. C0379- front axle short to ground?
15. C0550- abs module
16. B0790- neutral indicator
i know thats alot of codes but any help with input or suggestions would be great.
thanks in advance.

tahoe03

if any admin see this i posted this in the wrong section

kevinkpk

I'd say the loss of communication is causing almost if not all these issues. You might goggle the U1000 for advice.

73shark

Done.

tahoe03

thank you 73shark.

and from what research i have done so far the u1000 code is a secondary code that kicks in once a module stops communicating within the canbus system which in my case i am thinking it is my abs module, that triggerd the u1000 code.
now all of the transfer case codes i am thinking the previous owner did go mudding and i have washed about 5 pounds of mud out from under the tahoe and i think the water got into some not so good places.
and the previous owner also took out the radio and left me with enough 4awg battery cable i could have relocated the battery to the rear cargo area.
from what i am looking at i am thinking i need to do is crawl under the vehicle and go through every plug for the front axle, and tcase i can find and clean and put dielectric grease into the plugs and look for faulty wiring and bad grounds as my next step.
does anyone know of any thing else i need to be looking for while i am under the vehicle?