Two problems related to wiring have been reported for the 2008 Cadillac DTS. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Cadillac DTS based on all problems reported for the 2008 DTS.
Rear passenger fuse block (p/n 19116816) gets melted by a faulty fuse pump relay burning up due to a faulty design within the fuel pump system. Fuel pump putting a lot of resistance on the wiring, relay won't blow, but it melts. Without correcting this, the fuse box will be affected once the fuse pump relay overheats and eventually melts and burns. Car was stationed. This is unsafe by any means. The fire could have spread and caused the seats to burn and worse, it's right by the gas tank.
After parking my car in the garage,approximately 3 weeks later,I went to start my car,but it would not start,it would crank over good ,but would not start. I proceeded with with my own assumptions and found a pin(#30)on the fuel pump relay was burnt,I had an electrical diagnosis performed on the wiring and the fuel pump,both passed okay,I was told the fuse block was bad,(which I suspected),which I had previously ordered from the Cadillac dealer. On installing the new fuse block,the problem was solved.