My 2001 Suburban's tow/haul keeps coming on and off, the rpm's shoot up. Is there a fuse for this, I don't use it at all?? Michael.

Tow/haul mode enables the operator to achieve enhanced shift performance when towing or hauling a load. When tow/haul mode is selected, the tow/haul switch input signal to the body control module (BCM) is momentarily toggled to zero volts. This signals the powertrain control module (PCM) to extend the length of time between upshifts and increase transmission line pressure. Cycling the tow/haul switch again disables tow/haul mode and returns the transmission to a normal shift pattern.

Would't trust it , take an have DTC'S - diagnostic trouble codes checked by a qualified repair shop with a factory or professional scan tool . Auto part stores can not check BCM code's .
DTC B2722

Tow/Haul Switch/Indicator Always On or Inoperative

Step
Action
Value(s)
Yes
No
1
Install a Scan Tool .
Turn ON the ignition, with the engine OFF.
Cycle the tow/haul switch while observing Tow/Haul Mode on the Scan Tool .
Does the Scan Tool display Active when the switch is first pressed, and then Inactive when the switch is pressed again?
--
Go to Intermittent Conditions in Engine Controls - 4.3 L or Intermittent Conditions in Engine Controls - 4.8 L, 5.3 L and 6.0 L
Go to Step 2

Where is the question this appears to be a statement of an answer to another previous question

could be the switch or modual.check wiring for worn through or earthing.

your battery is being drained ,, check the plug in for the towing light hook up , something is shorted across ,, clean and tighten all connections to the battery ,, once the vehicle is running,, check the posts with a meter, you should get a reading of 13.5-14.5 volts, if not your alternator isn't doing its job

YOU HAVE TO HAVE VECHICLE TOWED IN TO A GARAGE ONLY THING YOU CAN DO IS TURN OFF RADIO TO KEEP FROM LOSING THE CODE, THEN DISCONNECT THE NEGATIVE BATTERY CABLE TO KEEP FROM DRAINING THE BATTERY.IF YOU DISCONNECT ABS BRAKE MODULATOR UNIT FUSE AND RELAY YOU CANT DRIVE VECHICLE UNTIL TOW IN FIX,YOU NEED DIAGNOSTIC EQUIPMENT TO FIX VECHICLE.NOT A HOME FIX.

When the transmission is in "tow" mode, the converter is unlocked. That causes the engine to run at a higher RPM but also since it's actually slipping internally (by design), it builds heat. If your radiator is the least bit internally obstructed or if you don't have a large enough transmission cooler (mounted externally), or, a combination of both items, everything will get hotter than it should be. Heat is especially bad for your transmission. The fluid chemically breaks down resulting in clutch slippage and burning.
If you do a lot of hauling, I'd get the largest trans cooler available making sure it's attached to the return side of the one inside the radiator and also change the fluid to a good grade of synthetic (resists heat damage far better than conventional fluid). Even if you think it's clean, I'd also flush out the radiator just to make sure.

You are talking about the trailer option button on the end of the shift select lever ?
I would say a fuse, check there first, and there is also a relay.
As far as I can tell all this switch does is take the tranny out of overdrive, which you can do with shift lever manualy.
If you do not find the problem, you may have to replace the switch.

Not sure if that got posted from my channel but I hope that helps you

most likely switch

Hi, the problem is when you are tilting the steering wheel all the way up it's putting to much tenstion on the wires that come outof your shifter that run to the tow/haul button. i am 99% sure your wires are disconected. rewire them and add some extra wire so next time there will be more slack in your wires.