Recently, my 04 Armada has been stalling intermittently. It will stall while driving down the road or waiting at a stop light. It will usually take a couple of tries to get it to start, sometimes it will start right up, and seems to run fine. The dealer has replaced both the fuel pump and crankshaft position sensor (both under warranty) but this hasn't fixed it. When I bought the vehicle new, the dealer had installed an aftermarket security system and I had it removed, but they left the wire harness connected under the dash. The new dealer thought this might be the problem so I removed the harness and all the wires. Still having problems. I called a car security dealer and discussed the problem with them. They said that in no way could a security system shut down an already started car. The systems are only designed to prevent a car from starting. He sounded convincing and I tend to believe him. I've searched other forums and found people with similar issues. The recommendation is to replace the IPDM (Intelligent Power Distribution Module) or perhaps replace the key because of the security chip. Anyone else have any suggestions?