Speedometer recalibration on 2022 refresh

[Bowtie]

I'm planning to install larger wheels and tires on my 22 refresh and will need to do a speedometer recalibration afterwards.
I've been unable to find any speedo recalibration units that are compatible with my truck due to GM changing the ECU codes, and I've called both Hypertech and Range/Pulsar to verify.
Does anyone know of any units will work on my truck?

 

[WVHick]

I don’t think anything will right now. The new ECUs seem tough to crack. Even whipple, pro charger etc want $1000 for an unlocked ecu

 

[Stormin08]

2700 for a TUNED HP TUNERS ECM

 

[Wacko]

You could always regear the differentials. That's the correct way to do it

 

[Stormin08]

that also needs to be programmed in.

 

[Wacko]

that also needs to be programmed in.

If you pick the right gears to match the tires the computer won't know the difference. Everything will appear stock to the computer. There are gearing charts to help with this. For instance, with my Jeep TJ, if you move up to 35 inch tires and change the gears to 4.88 you don't need to change the speedometer gear because it will read the same as having the stock gears and factory tires.

 

[GETGONE]

The problem is there aren't available aftermarket gearsets for GM trucks like there are Jeeps. I'm not aware of anyone that makes front differential gear sets.

 

[The Raven]

There is currently no way to do this. There is no known method for speedo recalibration and there are no gears available for the front diff. We don't know if there ever will be.

 

[Wacko]

The more I learn the more I'm regretting the purchase of this truck and certainly will warn others before they do.

 

[Jmzvet]

Is it really that big of a deal to have your speedometer off a few mph? Doesn’t bother me at all but everyone is different.

 

[Wacko]

It's not just the speedometer. It will affect shift points as well. Add to this the fact I can not turn off DFS or auto start. The biggest issue is the lack of gear ratios. What good are larger tires if you lose power in the process?

 

[The Raven]

The more I learn the more I'm regretting the purchase of this truck and certainly will warn others before they do.

Dude I know. When I bought my 2021 I was originally looking to order a 2023. But between GM's continuing "restrictions" that kept me from ordering what I actually wanted, constantly rising prices, and then learning that I may never be able to correctly modify my truck, I decided that the new interior wasn't enough to make me overlook all that. So I found a 2021 that had everything I wanted an only 11k on the clock and went for it. Everytime I see threads like this I feel like I definitely made the right decision.

Is it really that big of a deal to have your speedometer off a few mph? Doesn’t bother me at all but everyone is different.

The pulse that your speedometer uses is used by so many things - your MPG reading, miles-to-empty, Odo, and trip meters will all be wrong. The transmission gets trippy...there are a lot of things that are affected. Now none of these things are deal-breakers necessarily, and many drivers may never even notice them. But many (like me) do.

 

[The Raven]

It's not just the speedometer. It will affect shift points as well. Add to this the fact I can not turn off DFS or auto start. The biggest issue is the lack of gear ratios. What good are larger tires if you lose power in the process?

There are no gears for the 19-21s either. But i've been running 35's for almost a year now on my 21 and the loss of power isn't really noticeable. Remember you've got a 10-speed transmission now that has additional short ratios to work with and that goes a LONG way (really almost all the way) to make up for the taller final drive.

 

[GETGONE]

Don't forget the odometer will be off as well.

 

[buckshot85]

Damn, I guess some of you have to whine about something or you just can’t happy.

All those things mentioned above, totally irrelevant.
Mod your truck and enjoy it.
Quit trying to find useless crap to worry about.