I am new to this site. Found it searching the net looking for answers to why the Stabilitrak and Traction Control messages come on. I have a 2007 GMC Sierra Denali 2WD with 48000 miles. It is all stock except for lowering and a KN filter. I did read a five page thread on this same issue on this site but could not find it again after registering. Here is my issue..... When towing and usually under heavy throttle on grades the dash alarm sounds and the Stabilitrak off, service Stabilitrak, traction control, service traction control messages are displayed. As soon a the heavy load (more throttle) condition is over the system resets to normal display. I have not experienced any of the other conditions such a loss of power, erratic shifting, ruff engine performance. Since the system always resets I have come to just ignoring it as a nuisance. The engine check light come on occasionally but it always corrects after another tank of fuel and several cold starts. This Stabilitrak traction message started last summer on occasion but is occurring more frequently this summer. I have read the owners manual on these systems and the associated trouble codes and it points to heavy throttle downshifts as a possible trigger to the message display. I have read, and will look into removing and cleaning the throttle body and sensor issues other posters have suggested. Since the truck is no longer on warrantee I would prefer to solve this myself. Using California fuel with 10% Ethanol. Any help is appreciated.