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BigToe's avatar
BigToe
Explorer
Jan 20, 2019

GM Trailer Brake Control: Left or Right of steering wheel

A few years ago, GM broke tradition and installed their integrated factory trailer brake controller on the Left hand side of the steering wheel.

Traditionally, both aftermarket (Tekonsha, Kelsey Hayes, BrakeSmart, etc) and OEM factory (Ford IBC, Ram) trailer brake controllers are positioned on the Right hand of the steering wheel.

Recently, GM abandoned their "odd man out" Left hand OEM trailer brake controller, and moved it to the Right hand side, like everyone else. This can be seen now in the new 2019 1/2 ton pickups, and will be seen shortly in the newer 2020 3/4 and 1 ton pickups.

This design reversal is very interesting on several fronts, not the least of which are ergonomics, operational safety (human reaction response), operational ability when multi tasking in brake emergency, as well as on fronts that don't really effect us as RV'ers, but might be of interest to some here as brand loyalists.

By moving the trailer brake control back over to the right hand side of the steering wheel, GM is essentially admitting design defeat. A distinguishing design element distinct from other brands was summarily extinguished. Is this a good thing, in your opinion?

I'll stick my neck out and start by saying yes, I'm glad to see the brake controller back over on the right hand side. While I can appreciate that GM tried to make the brake controller more visible by placing it higher up on the dash by the heating register on the left, and while it was likely possible to rest one's arm on the door and still operate the brake controller slider... the fact is, in situations were that slider would need to be activated, it isn't like my arm is going to be resting easy on the door. It means that all arms and hands are in active duty mode, managing or mitigating against a pending emergency unfolding.

And that pending emergency is really the problem with a left hand brake control position. The brake controller isn't the only supplemental hand operated tool to manage supplemental braking. The TRANSMISSION lever (or stick) is another tool, as well as the exhaust brake switch (if equipped).

So if I am steering for dear life to maintain directional control of the combination of vehicle with one hand, and using the other hand to engage/disengage, shift, or change positions of the other three tools in the cab to mitigate a pending disaster... I had better not have to switch hands on the steering wheel back and forth during the scant few milliseconds available to avoid disaster.

If my left hand is clutching the steering wheel, I can use my right hand to operate all three other tools: down shift transmission, engage the exhaust brake, and feather the brake controller slider.

If the brake control slider is on the left hand side of the steering wheel, then I'd have to switch hands on the steering wheel while trying to steer straight and think straight while engaging all the other tools to mitigate the sudden disaster (deer crossing, sudden lane change and brake check of another motorist, whatever the case may be that unfolds suddenly).

Now, with that all being said, the exposure I've had to emergency braking situations while pulling has been limited. I have used the sliding controls on my Tekonsha Sentinel, Prodigy P2, and DrawTite Activator, plus one more brand of brake controller whose name escapes me... from time to time when descending grades when I felt the weight of the trailer pushing the tow vehicle a little. On these easy situations, it probably wouldn't matter which side of the steering wheel the trailer brake controller was on, although by now my habit formed reach impulse would still favor the right side.

Which leads me to you, and your opinion. If you happened to own a GM truck that had the integrated brake controller on the left, were you able to easily break your right hand habit? And even if/when you did get used to the brake controller being on the left, have you ever experienced an emergency management session where you wished the darn thing was on the right, so you could use the same hand to downshift, switch on the exhaust brake, and hang on to your dear wife for dear life, all while keeping your left hand firmly fixed on the steering wheel?

Please talk about your experiences with GM's left hand trailer brake controller, and share what you think about GM getting back in line with the rest of the industry and moving the integrated brake controller back over to the right hand side of the vehicle in the center stack.

Thank you in advance for your in depth thoughts on the matter. One of my reasons for the question is due to the new Silverado 4500/5500/6500 series that Navistar is manufacturing for GM using GM's now "old" and "outdated" 2015 cab style which still has the integrated brake controller on the left hand side of the steering wheel, along with the identical International branded CV Series. I am considering this platform as a replacement to my current medium duty truck, but the left hand brake controller position appears bothersome, even though I have no personal experience with it. The fact that GM quickly changed the brake controller's position over to the right after one brief design cycle in their new pickups is telling me my hunch is correct. The left hand side was a bad idea.

But what do you think, given all the aspects already raised, plus any new talking points you can think of with respect to trailer brake control position and operation?

49 Replies

  • ksss wrote:
    I have a 08 2500HD with the brake controller on the left as well so I am sure it was introduced in late 07 when the GMT900 was released. So GM has been on the left for at 10 or 11 years.



    Thank you for that correction! A great example of where your experience with the product deflates the false logic brewed from my limited observation.
  • I have a 08 2500HD with the brake controller on the left as well so I am sure it was introduced in late 07 when the GMT900 was released. So GM has been on the left for at 10 or 11 years.
  • Just to clarify, when I said "dated" and "old" in my original post, I put those adjectives in quotation marks back when I first wrote them, as I have again just now. What those quotation marks are intended to distinguish is someone else's idea from my own.

    I do not personally think that the 2015 era GM interior is "dated" or "old"... how could I, when the very newest interior I have is at least a dozen years older than that. The quotes mean that by some standards, the interior is dated compared to the most recent GM interiors now in the 1500 and soon to be in the 2500/3500. The quotes are a mechanism to highlight the fact that GM updated the interiors, and in that update, GM moved the trailer brake controller from the left hand side to the right hand side.

    IIRC, Ford introduced the integrated trailer brake controller in 2005. Right hand side. Ford has revamped the entire interior in both the 150 and the 250/350/450/550 several times since 2005, and in each successive design iteration, Ford has always kept the integrated trailer brake controller on the right hand side.

    By contrast, GM only had the left hand brake controller in place for one relatively short (just 3 or 4 years?) design cycle. The very next design cycle, GM moved the brake controller to the right hand side. This is the difference that caught my attention.

    I've never owned or operated a pickup truck with factory integrated brake controller, or a factory integrated exhaust brake. My medium duty truck is 20 years old. My motivation for this post isn't to criticize GM. What I am hoping to gain from responses to this thread is the benefit of other user's experiences with the operation of factory integrated brake controls, and their placement on either side of the steering wheel, in combination with other tools that did not exist when my truck was built, which includes the exhaust brakes now common to many diesel powered light and medium trucks.

    Responses that merely point out my inexperience with the operation of either of these devices are not as instructive or as helpful as responses that talk about YOUR experience with switching from right hand to left hand brake controls, and if the switch was at all bothersome in any way.

    Thanks!
  • Both of my personal vehicles that tow have the brake controller mounted high and on the left. I like the display to be visible without looking down, and I like to be able to keep my right hand on the wheel while braking with my left hand.
  • Yea I think your overthinking it or you haven't orientated yourself to the operation of the truck very well. As soon as I get in my GM HD with a trailer hooked up, I push in the tow/haul and I hit the exhaust brake switch before I even put it in gear. I then as I pull away with a load I set the adjustment with the left hand on the brake gain. I pull often enough that in dry conditions based on what trailer I have on and how much weight is on the trailer I know what number to set it at. All of that is done at no speed or low speed. When I am driving at speed, there is not typically any emergency actions to take as far as activating switches or adjusting brakes. If the brakes do need to be adjusted (sometimes necessary during the Winter, it is done with the left hand and only takes a second or two. If you running it in manual than the gear selection is done with my right thumb with right hand on shift handle. Honestly since my 2015 and now with the 18, I have never used manual. Use it often in my 06 and other D/A's but have not needed it on the newer trucks.

    As for the interior on the new Medium duties, I dont find it dated. My expectations in those trucks is much different, at least for me. Extreme durability is my biggest expectation. Ergonomics is next and lastly visual appeal. My interior on my GMC 05-5500 4X4 was poor, way too much light duty plastic, ergonomics were good, everything that mattered could be actuated with gloves on. However the quality/durability was not where it should have been for a med. duty truck. It rattled from day one. Plastic pieces broke, seat was not great either. I was really hoping for an update. Turned out I got one, 10 years later but looks like they are here.


    The fact that they are using the same GM cab is actually a comfort for me. It should be as tight as the HD GM pickups and I never had issues with the interior falling apart on those trucks, but if it can be broke, it will in a medium duty truck in a commercial application.
  • Having used Ford/Dodge and GM trucks in service pulling GN trailers I always had my electric or hyd brake controllers mounted on the left side. The right side was always cluttered with gear shifters/exhaust brake controls/ignition switch/air and heat controls/radio controls and coffee/soft drink holders.
    I never had any issues with knowing which hand to use during a emergency maneuver.
  • OP, you are really overthinking this. If you don’t like it on the left, don’t buy a GM truck or just install an aftermarket brake controller any place you want it. Just my opinion.
  • I think if I needed it and knew where it was, that'd be good enough for me. Trucks were made for a century without any integrated brake controller for that matter.
  • I like it on the upper left side. Maybe because I used to it, but it is easier to see and I don't see how making it left or right hand operated matters. Being right handed, I would prefer to run the wheel with my right hand and adjust brake with left since adjustments are made while moving. It is all subjective. I certainly don't consider moving it to the left admitting that they made a mistake. Maybe the GM guy doesn't care but converting conquest buyers it would matter. Who knows.