I have been working on a 2008 SRX that the fuel system shuts off at random. When it does, the vehicle cranks but will not start. All of the symptoms indicated a faulty fuel pump. Fuel pump was replaced and vehicle ran fine for about 4 days and it did the same thing again. Took vehicle to two authorized Cadillac dealers and got two different stories. One said camshaft sensor(s) faulty and the other said either bad fuel pump or wiring harness to fuel pump. Has anyone had this type of problem and if so, what was your resolution? Vehicle only has 77,000 miles.