To correct for tire change

[TC98]

I have a 06 SD CC SW. I currently have BF Goodrich LT265/70R17 they are e rated for 3195. I have a truck camper that goes about 3600 lb Loaded, and I sometimes pull a boat so i just bought a set of the 08 20 inch Goodyears for the 3750 Lb rating.
Now what do I need to do to get the speedo right and let the engine know the size of the tires. I know that I can just probably drive just 5 mph slower and all would be OK. But would like to senq it all up. I believe I can flash the chip, what is the best way less expensive way to getRdone.
Thanks
TC98

 

[Dogman]

I have a 06 SD CC SW. I currently have BF Goodrich LT265/70R17 they are e rated for 3195. I have a truck camper that goes about 3600 lb Loaded, and I sometimes pull a boat so i just bought a set of the 08 20 inch Goodyears for the 3750 Lb rating.
Now what do I need to do to get the speedo right and let the engine know the size of the tires. I know that I can just probably drive just 5 mph slower and all would be OK. But would like to senq it all up. I believe I can flash the chip, what is the best way less expensive way to getRdone.
Thanks
TC98

Need to go to your dealer and have them reset the speedo and shift point for the tire size, should run about 100 bucks.

 

[TC98]

That easy ah Sounds Great!!!!
Thanks TC98

 

[TC98]

Went to the dealer they reset it for the 20's and reflashed-updated the computer. They didn't charge me a dime and it took about 10 min.
Thanks for the help
TC98