I'm wondering if anyone else has experienced this. I recently had the ECM Relay Recall performed at the dealership. I noticed my truck didn't start on the first start attempt when I picked it up. Normally it starts immediately. Over the next week or so it constantly failed to start immediately. I figured the battery may have been getting weak so I had it and the alternator tested and both were good. Could the ECM Relay replacement have caused this? I also had the fuel level sending unit replaced.