Made a 3 hour trip towing yesterday and no problems. Started truck this morning and engine light is on, fuel tank full but low light is on and truck has no power. I'm sure it needs to go to dealer but what could be wrong?

Recently, I had the #2 & #7 injector harness problem and the fuel gauge did the same thing. Also, check the harness ground located under the driver's area on the cross-member.

Dealer said it was injectors/wiring harness. They told me that when your low fuel light comes on that means injectors/wiring bad.