My 06 Tahoe has been giving me an intermittent problem. Every so often when I start it up and drive right away the engine will cut out and show the message "reduced engine power." If I start it up and let it warm up for 10 min or so it won't cut out. I ran the codes and replaced the TPS and the accelerator and got them synced and it just did it again. I'm at a loss right now. Any ideas?