Discussion Starter · #1 · Sep 14, 2015. I started my 2011 LML this morning to have the service traction control, service stabilitrak indicated. The truck was also in limp mode only able to go about 35. Still was able to go into gear but hit real hard when changing the selector. Any ideas on what might be the issue would be greatly appreciated. I`ll be driving down the highway at 65mph the stabilitrack light goes on followed by traction control off, service stabilitrak , reduced engine power. The truck goes into limp mode and the check engine light stays on.