Rough Country Speedometer calibrator

Bstevens1084 · October 23, 2019

Speedometer calibrator for GM SPEEDOMETER CALIBRATOR (07-18 1500 / 2500 / 3500 GAS MODELS), asking $75 OBO plus shipping costs if not local to Dutchess County NY

rah7777777 · November 3, 2019

Can you use this on multiple vehicles? Or does it “lock” to 1 at a time?

Bstevens1084 · November 4, 2019

It can only be used on 1 vehicle at a time. This unit is clear of any vehicle info from my previous truck. Once you return the vehicle to stock the device is cleared of previous vehicles info.

rah7777777 · November 10, 2019

I’m really on the fence with this one.
my truck is off just a little (1 tire size).
I really would like it to be dead on, but afraid of that extra “tic” on the ECM in case warranty gets picky about something.

Is it worth it? Is it not? I don’t know haha

until then, Bump for the seller. If someone else buys it, my problem is solved for now.

Bstevens1084 · November 23, 2019

SOLD

Taz56 · December 24, 2019

Bought this a few weeks ago and just got it today (shipped to Canada). I went from 265 65R18 to a 275 60R20

It took 5 min to download the software and program it, then 3 min to install. REALLY easy.

You can only use it on one truck as a time (commenting to the post above) because it actually goes "in-line" to your existing wire harness. You do not plug it in, calibrate your truck and pull it out. It stays in your vehicle.

Have not taken the truck for a spin yet, but if it works how everyone says it will, I will be very happy.

rah7777777 · December 25, 2019

Is it not the same one pictured at the very top?

I like the idea of it being online versus programming so it doesn’t show up on the dealership computer for warranty.

or is it both?!

Taz56 · December 25, 2019

Nope, inline only the one for the 2019

Taz56 · December 27, 2019

On 12/24/2019 at 6:51 PM, Taz56 said:

Nope, inline only the one for the 2019

Did not work. I have an e-mail into them and we will see. It calibrated, or said it was successful anyways. But when I put it in my truck, no difference, Speedo is still off by 6KM/Hr.

rah7777777 · December 27, 2019

I'm confused. Did you buy the one from this thread from the original poster above?

Taz56 · December 27, 2019

4 minutes ago, rah7777777 said:

I'm confused. Did you buy the one from this thread from the original poster above?

I posted the link in the picture to the one that I bought. It is the rough country but the one posted by the original poster only goes up to 2018. I drive a 2019 and for the 2019 they only have the in-line.I posted the link in the picture to the one that I bought. It is the rough country but the one posted by the original poster only goes up to 2018. I drive a 2019 and for the 2019 they only have the in-line.