Tow mode question.

[xjarcher]

The last time I hooked up a trailer and put the truck in tow haul it worked properly. Dash says tow haul mode engaged but the icon that showed the length of the trailer didn't appear. No codes present. No damage to vehicle at all. Any ideas why it wouldn't work?

 

[JF19Longhorn]

Mine usually doesn't show that 30' icon unless I hookup my larger trailer and even then, not until I've turned atleast once. I 'think' the blindspot sensor need to figure out how long your trailer before it'll put that icon up.

 

[Richard320]

Did that trailer have a 4 pin or a 7 pin hookup? I believe the trailer length and all that are triggered by the electric brake circuit. Tow/haul only adjusts transmission shifting.