How do you verify if the tow/haul button actually works?

[4570Man]

I’ve got a 2500 suburban with a 4l80e transmission. It seems like the tow haul function is staying on despite the little trailer emblem going off. It’s pushing the shift points high and doesn’t seem to be shifting into OD. I need to experiment with it more tomorrow.

 

[MossRoad]

What year Suburban? Just curious.

 

[4570Man]

2004

 

[buckeyefarmer]

Mine is very noticable on or off.

 

[4570Man]

Mine is very noticable on or off.

I’m pretty sure it’s staying on all the time but when I press the button it’ll turn the trailer emblem on and off.

 

[countrybumpkin]

Could be the pressure control solenoid going out too.

 

[tjkubota93]

Like they said, should be noticeable. If not, would have to use scam tool to verify that input and if trans has any problems.

 

[Doofy]

Like they said, should be noticeable. If not, would have to use scam tool to verify that input and if trans has any problems.

Hahahaha. "Scam Tool". I need one of those!

 

[4570Man]

Hahahaha. "Scam Tool". I need one of those!

Craigslist is full of them.

 

[TractorGuy]

Not that it's related but the wire on my F150 shifter got chafed and was keeping the OD light on. It wasn't disengaging the OD and the switch would still function. I replaced the shifter with a generic one from O'Reilly.