Tow/Haul mode = Sports mode!!!!

[1500fp]

I will give this a shot and report back with my findings as well. I typically get 15-18mpg so if there is a noticeable swing i will let you know. It's only gas guys, give it a shot and report back.

I will give this a shot and report back with my findings as well. I typically get 15-18mpg so if there is a noticeable swing i will let you know. It's only gas guys, give it a shot and report back.

[Travis Whitmore]

I see how it could help mileage in town but on the freeway I shift out of tow haul. Otherwise it doesn't shift in to overdrive.

[Justin Nachazel]

It makes absolutely no sense that you would get BETTER mpg with Tow/Haul - it keeps your RPMs higher and delays up-shifts. By definition, you're burning more gas. Unless something has changed, there is no change to the engine tuning, it only changes shifting.

 

Thats what I was thinking but people are saying they feather the gas to keep it in v4.... not really sure having to feather the gas every acceleration would be worth it. Im excited to see some numbers lol

[emeryz28]

anyone found any actual downside to this yet? don't care about MPG but meaning extra wear and tear or confusing the ECU by always being in tow haul?

 

 

also what do you guys mean by M6 and M5, you put it in manual and actual shift with the button while driving?

[TxTruckMan]

There shouldn't be any downside that I can think of. Even the mileage hit I would expect to be minimal - 0.5 to 1.0 mpg.

[gmckenzie]

also what do you guys mean by M6 and M5, you put it in manual and actual shift with the button while driving?

 

If you put it in manual mode and M5 it turns off the AFM so you don't go into V4 mode.

 

I find the V4 mode shudders, almost as if I'm lugging the motor, when driving in town. I don't like it so drive in M5 most of the time in the city.

[1500fp]

 

If you put it in manual mode and M5 it turns off the AFM so you don't go into V4 mode.

 

I find the V4 mode shudders, almost as if I'm lugging the motor, when driving in town. I don't like it so drive in M5 most of the time in the city.

Glad i am not the only one who notices the V4 shudders. Must be an "issue" on all of them.

[Justin Nachazel]

Hm the only think I notice really is my truck has a super hard time shifting. I have a 3" lift on it and I didn't drop the drive shaft. Do you think that could be the culprit?

[bertiman]

I see how it could help mileage in town but on the freeway I shift out of tow haul. Otherwise it doesn't shift in to overdrive.

 

 

Overdrive works in tow mode on my 2015 5.3L 6spd....

[robvas]

Overdrive works in tow mode on my 2015 5.3L 6spd....

You could try driving around in M5

[Travis Whitmore]

 

 

Overdrive works in tow mode on my 2015 5.3L 6spd....

Seems to lock out 6th on mine on the freeway.

[Haus_Z71]

I had blackbear modify my tow haul to make it sport. It was awesome!

 

I'd like to know the details on this. So they modified your tow haul mode how? Is it still optimized for towing?

How is your tune for regular drive then?

My tune is in progress with Blackbear so id like to consider this.

[Justin Nachazel]

Ok ladies and gentleman,

 

I decided to run 3 tests to get some actual numbers. Take them for what you will and know that I drive like a grandma and worked with what I have.

 

Specs:

- 2015 Chevy Silverado LTZ 4x4

- 3" leveling lift

- Airdam still on

- RetraxOne Tonneau cover

- Stock 20" rims and tires

- DeeZee step bars

- Running in 2WD mode

 

Distance:

- 10 miles exact

 

Terrain:

- City stop and go with occasional long stretch all flat land

 

Weather:

- Cloudy and 64 degrees F

 

Location:

Camarillo, CA

 

Assessment with Tow/Haul ON:

- While driving with this on for the 10 mile distance I was able to achieve 15.2mpg during which time I noticed that the RPMs consistently stayed high. Shift points seem to be smoother but at the same time the truck was staying in the same gear for longer before shifting. The hard shifting that normally ensues with my truck went away. The truck DEFINITELY has more sport to it. From a dead stop there is no delay and the throttle is more responsive and more aggressive.

 

Assessment with Tow/Haul OFF:

- While driving with this on for the 10 mile distance I was able to achieve 19.7mpg during which time I noted normal shift points. The shifting is definitely more rough but the rpms constantly stayed down keeping the truck in a higher gear. There is definite difference between having Tow/Haul engaged and not having it engaged when it comes to throttle responsiveness.

 

Selective Tow/Haul Engagement:

- As I was reading through the comments I noted some people saying that the truck remains in gears longer and stays in V4 mode longer. I got to thinking about that and decided to try one more experiment with selectively engaging the Tow/Haul button when in v4 mode to keep the truck there longer. This actually yielded some surprising results. Driving the 10 mile stretch while engaging the button each time my truck entered v4 mode yielded 21.7mpg! Granted, engaging it each time and disengaging it when v8 came on was kind of a pain, but an argument can be made for long distance driving where v4 engages more often and for longer periods. On the freeway my truck stays in v4 most of the time at 70mph but kicks into v8 when a slight hill comes up. If the truck could be forced to stay into v4 during these transitions to small hills, there might be quite a significant increase in mpg.

 

This is just a rough test and I actually plan on doing a freeway test today if I end up going back out. The test will be a 20 mile approx test but I will have more exact numbers when I do it. Let me know if anyone else attempts this or tries this out on the freeway.

 

The truck:

[emeryz28]

If you put it in manual mode and M5 it turns off the AFM so you don't go into V4 mode.

 

I find the V4 mode shudders, almost as if I'm lugging the motor, when driving in town. I don't like it so drive in M5 most of the time in the city.

 

 

wait so you are saying I can put it in M5 and drive around and it will shift up through the gears normally but stay out of V4? It won't just stay in 5th? or do you need to shift your way up to 5th with the buttons?

[fondupot]

 

wait so you are saying I can put it in M5 and drive around and it will shift up through the gears normally but stay out of V4? It won't just stay in 5th? or do you need to shift your way up to 5th with the buttons?

Set it and forget it. Shift to M, click up to 5 and it will shift like an automatic until you shift out of M.