Abs , stabilizer lites on & off
Dealer can't figure it out.
Started to have this problem after going threw high pressure car wash.
The lites come on for a day, go off and a month later comes on again.
When these lights comes on the truck seems to run ruff

 

Run your grounds, check grounds and clean them, some use dielectric grease, Do the same for your + positive cables. Check your ride sensors for open connections too. Check your battery leads to the starter.


I had 2003 denali with the same issues. I cannot ID the exact cause, but after doing what I recommended it cured the issues.