Wiring Diagram with pinout

[GOOD_GUY]

I have tons of wiring issues that I inherited from a previous owner of my 08 LTZ. Problems like the tire's psi sensors are backwards (front is back and back is front), parking assist faults (verified signal and devices), door locks are not working, some brake lights don't work, etc.
So, how can I get wiring diagrams with pinout detail?
Thanks

 

[ygmn]

HELMS makes Chevy service manuals.

https://www.helminc.com/helm/Result.asp?Style=helm&Mfg=GMC&Make=CHV&Model=AVAL&Year=2008&Category=&Keyword=&Module=&selected%5Fmedia=

 

[2004Slickside]

I have tons of wiring issues that I inherited from a previous owner of my 08 LTZ. Problems like the tire's psi sensors are backwards (front is back and back is front), parking assist faults (verified signal and devices), door locks are not working, some brake lights don't work, etc.
So, how can I get wiring diagrams with pinout detail?
Thanks

AlldataDIY subscription has the factory wiring charts.  You can find the pinouts if you dig.

 

[EXT4ME]

.... Problems like the tire's psi sensors are backwards (front is back and back is front) .... ?
Thanks

The TPMS sensors need to be retrained to the truck's computer any time a tire is moved to a different location.

It is possible someone rotated the tires and did not reprogram the computer.

The truck simply is getting a signal, but it is using the old location and reporting what it sees.

Simple fix.