The engine has 13,441 miles on it and it has been consuming 4 quarts of oil in 1700 miles. The dealer sealed the engine and is performing an oil consumption test. Approximately 500 mile into the test the check engine light started flashing due to a misfire. The dealer found that the #1plug was fouled out and had to be replaced. At 1029 miles into the test the truck was idling in a parking lot for about 8 minutes when it started to misfire and stumble. After stepping on the throttle to clear out the misfire, the dash lit flashing multiple warnings including the breaking system was stuck on hindering the truck from being able to move. After several restarts and playing with the parking brake I managed to get the parking brake off. It still had the flashing check engine light on and flashing. The pre-collision light was flashing, along with the traction control light was flashing and none of the safety systems were working.