My engine light is on along with service the traction system prompt. Went wheeling on tuesday and thursday the lights came on. Don't know if this is a coincidence or what, but I ended up bottoming out in some big ruts and needed to get pulled out. I sat in the mud for a while before there was some one to pull me out. I worked the hummer hard trying to get it out but failed.I spoke with onstar and she said there is a power train problem along with a fuel system problem. The truck is running rough and has lack of power. Once I got out I ended up powerwashing the truck and the engine compartment can't help wondering if that had something to do with this. please post your comments.