Drove to store, ran fine, shopped. Attempted to start truck, runs about 3 seconds then dies. Gauges all read good only Red Light flashing. Have full tank of fuel. Have after market fuel pump on rail. Any suggestion will be appreciated!

 

what red light is flashing?

 

Red Light Flashing to right off speed indicaor. I have never seen it before. So, I walked home got my car & code reader. Went back, truck started right up & I drove home with no other
problems. By the way it showed no codes. Got me baffled!

 

Red Light Flashing to right off speed indicaor. I have never seen it before. So, I walked home got my car & code reader. Went back, truck started right up & I drove home with no other
problems. By the way it showed no codes. Got me baffled!

 

Not the 'security' lite by any chance??

 

 

Yeah, that's how its supposed to work. I would guess the battery in your FOB is getting weak, or, the contacts for the chip in the key are getting dirty. Or something like that.