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

   / How do you verify if the tow/haul button actually works? #1  
4570Man

4570Man

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Crossville, TN
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Kubota M59, Kubota L3800, Grasshopper 428D, Topkick dump truck, 3500 dump truck, 10 ton trailer, more lighter trailers.
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.
 
   / How do you verify if the tow/haul button actually works? #2  
What year Suburban? Just curious.
 
   / How do you verify if the tow/haul button actually works?
  • Thread Starter
#3  
2004 IMG_7398.JPG
 
   / How do you verify if the tow/haul button actually works? #4  
Mine is very noticable on or off.
 
   / How do you verify if the tow/haul button actually works?
  • Thread Starter
#5  
buckeyefarmer said:
Mine is very noticable on or off.
Click to expand...

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.
 
   / How do you verify if the tow/haul button actually works? #6  
Could be the pressure control solenoid going out too.
 
   / How do you verify if the tow/haul button actually works? #7  
Like they said, should be noticeable. If not, would have to use scam tool to verify that input and if trans has any problems.
 
   / How do you verify if the tow/haul button actually works? #8  
tjkubota93 said:
Like they said, should be noticeable. If not, would have to use scam tool to verify that input and if trans has any problems.
Click to expand...

Hahahaha. "Scam Tool". I need one of those!
 
   / How do you verify if the tow/haul button actually works?
  • Thread Starter
#9  
   / How do you verify if the tow/haul button actually works? #10  
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.
 
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