When i shift from park to drive the tow haul light comes on sporadically. U-Haul rep and trailer nerd Sperry Hutchinson showed us exactly what can happen when a trailer is loaded incorrectly, and how to make sure your rig doesn't start the truffle shuffle next time you tow. If your concern is your transmission when you tow, turn off overdrive to stop the transmission from constantly hunting the higher gear. I can press the button and it will go off. It still works, but the indicator doesn't light â¦ this should re-set your computer thus not showing you in tow haul mode untill you push it â¦ The tow/haul featuremay suddenly come on or if i try to activate it wont come on. Tow/haul Mode locks out the overdrive on the transmission so when you are pulling a load it does not do that "hunt" for gears thing that it will do when pulling a load under a load. Happens only when slowing down in tow/haul in 3rd - â¦ Is there a fuse to de-activate? 5.3 V8. I now have a 2015 F150 and did some towing today with and without the tow haul mode on. Other times it doesn't come on. You could try disconnecting the switch and momentarily grounding the light blue wire, that should signal to Powertrain Control Module to the tow/haul off state. And my cruise control light is now off when I click it. Your truck has the LM7 which engine comes with the 4L60E tranny which is a light â¦ Pressing the switch a second time restores the â¦ To use the Tow/Haul mode, use the selector button found at the end of the shift lever. This page describes what was done to enable the Tow / Haul function on my 2001 Crew Cab. The third type of trailer offered by U-Haul is the companyâs car trailer. In my F150 it seems to make a bigger difference. Its versatile design maximizes your investment so your fleet never sits idle. If the light is on and it does not respond to pressing the button on the end of the shift stalk, then there is probably an issue with the switch. Stay away from the large U-Haul on Route 1 North in Edison,NJ. Pressing the switch a second time restores normal operation. The Performance Mode Option setting decides which it is. After a trailer almost came off my hitch due to an employee giving me an undersized tow ball,I would recommend not going to U-Haul for trailer rental either. The Tow-Haul light flashing indicates something is going wrong, and it is going into the memory of the TCM (Transmission Control Module). Use of ERS (or TOW/HAUL mode) also enables an additional underdrive gear which is not normally used during through-gear accelerations. When tow haul mode was off I felt like the transmission was shifting way too often. In Tow/Haul mode, you may also select the Grade Braking function. Tow/Haul mode alters the shift schedule, not the actual gear ratios, but this makes it easier to get a kickdown (to a lower gear) and may hold you in a lower gear longer as you accelerate. As for lighting, there are several methods to get hooked up, ranging from connecting at the front of the first trailer, to finding the wires at the back of the first trailer, to installing the bulbs with the pigtails in the lights of the first trailer (U-Haul has them). Customers can choose between a tow dolly (better for local moves), an auto transport (designed for long distance moves) and a motorcycle trailer. Your tow/haul button actually changes the shift cycles of your transmission. this is the glove box code list: In this list Now my tow/haul light flashes on and off, but not really in a sequence, just whenever it feels like it (No fault codes). If the TOW/HAUL mode is desired, the switch must be pressed each time the engine is started. 0 votes . My 2001 Chevy 1500 Express Van. Push the TOW / HAUL button next to the shifter for improved vehicle performance and fuel economy while minimizing engine noise during trailer towing or heavy-load hauling. For awhile now my tow/haul button on the column shifter doesn't work and the truck goes into it on its own and I can't get it to come out, sometimes I can turn the truck off and restart it and it will not be in tow/haul mode but sometimes it stays in it. 02-15-2016 #2. nannerhammock. My truck has the factory fog lights. Engine light starts blinking on my 2002 Silverado (5.3 l) when towing 4000 lb trailer in Tow Haul mode in 3rd gear. Beyond that, be careful to load the trailer with an appropriate amount of weight in front and behind the axle on the trailer. While many trucks have the ability to haul a trailer, some have a special tow/haul mode that helps you tow heavier â¦ Just remember if youâre going to be traveling over hills or any kind of steep or uneven terrain, tow/haul lets your transmission shift a little sooner and compensate for the extra weight, preventing wear and tear on your engine. As for the Tow/Haul/Performance Mode switch it can be either hardwired or via a serial message from the BCM. Go from pulling a lowboy to towing a disabled truck with the touch of a button. tow/haul button Thanks for your reply's, tried to remove button from the top, wouldn't come out. U-Haul will be able to advise you on the limits. The âTOW/HAULâ light will illuminate in the instrument cluster to indicate that the switch has been activated. Question = No tow/haul light on, the system does not activate when I push the button on the shifter. Re: tow haul light turns on but does not work Apr 05 2014, 1:32am I know with my 2008 if I turn on tow mode while on a hill I usually dont notice a change either. There are like 4 small wires in the lever and one is probably not connected . The tow/haul mode only changes the shift points, to allow more bottom end when starting out, it allows the transmission to stay in the lower gear longer before it shifts to help get the load moving. The light would come on and go off randomly (only when turning off/turning on truck, not change while driving). I might be wrong, but I think the tow haul mode would disable overdrive which is probably why my gas mileage stunk. Another important factor is your truck's power. U-Haul trailers are pretty heavy, so unless you are hauling pretty light cargo, you won't be able to use a very big trailer. The electrical connector is located inside the steering column covers. This additional gear can improve vehicle performance and cooling capability when towing a trailer on certain grades. Have a diagnostic test â¦ 2002 Suburban LT Autoride 4x4 5.3. Itâs designed to make hauling a big cargo easier, but certain drivers get more comfortable with it than others. Whatever works for you is good. Pulled this off jeep .com hope this helps. A multi-use towing and hauling machine, the TowHaul Gooseneck is the one piece of equipment that makes it all possible. U-Haulâs second type of trailer is the utility trailer, designed to haul bulkier landscaping items and building supplies. I can't seem to find a common cause for it to come on, it is just random. I have a 01 sierra, could be a coincidence nut but since a heavy rail storm a few weeks ago my tow/haul mode goes on by it's self,(has never happened before) this â¦ The donor vehicle in this case was a 2000 Blazer 4 door with the factory fog lights and Tow / Haul. The tow/haul switch is part of the shift lever and is not replaceable without changing the shift lever. I need to try and flash it back to stock to see if it gets rid of it, just thought I'd share in case anyone else is noticing this. Alright well yesterday i got in my truck to go down to the farm and when i cranked it it didnt want to turn over at first, so i tried it again and it struggled but started up, looked at my dash my tow/haul light was on so i clicked it off shut off my truck and it started just fine, no more tow/haul on. The TOW / HAUL mode inhibits fourth gear and allows upshifts to third gear during higher speed / lighter loads. tow haul light flashing and transmission gauge is not working. Simply disconnecting the switch will not turn your tow/haul light off. Replace swith lever? Sometimes when I start up my 2007, when I put the transmission into drive, I notice the tow haul light on and the shifting is in tow mode. Light off, back to normal. As the mode is expected, it became active when the light was on. decided to work a small knife edge into the sides of the button to work it free, after a bunch of attempts the button started to work like a button switch, seems from years of non use and sticky beverages the button was stuck down. Chevy Express Van Tow / Haul Light. These are controlled by the BCM and I did want to retain that. Answer: The switch and function are controlled by the body control module (BCM) Possible switch or bcm faulty. Good Morning, My 2001 z71 Tahoe has 312,000 miles on her so I know things will arise that will need to be fixed. It DOES NOT lock out the 4th gear, or lock it in, meaning you can still get the "hunting for gears" while towing up hills, etc. try removing the power wire off your battery then re-connecting it. In ERS mode, gears 1 though 3 are underdrive gears, and ERS 4 is direct drive. Vehicle: 2007 ford f250 super duty 5.4L tow; haul; flashing; light; 1 Answer. 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