HELP!!!!!

[03 Big Red]

I filled my 03 SD 5.4 with gas today and a few minutes later I noticed my speedo wasn't working and my engine and ABS warning lights were on and my overdrive off light was flashing!!! I've tried everything I know. HELP!!!!!

 

[blacksnapon]

I filled my 03 SD 5.4 with gas today and a few minutes later I noticed my speedo wasn't working and my engine and ABS warning lights were on and my overdrive off light was flashing!!! I've tried everything I know. HELP!!!!!

On top of the rear diff is a sensor. I've replaced a bunch of those.

 

[03 Big Red]

Found it. What's it called so I can get one?

 

[blacksnapon]

I think its called rear wheel speed sensor. (But i've been wrong before!)

 

[03 Big Red]

Thanks!! I'm going to look it up.

 

[03 Big Red]

The parts page says there's a speed sensor at the front too. How do I know which to replace?

 

[blacksnapon]

The parts page says there's a speed sensor at the front too. How do I know which to replace?

Replace the rear one. That one more accurately shows your speed.