johndeereman346
Active VIP Member
Just wondering if anyone has up sized their tires and been able to recalibrate the speedo the superchips cortex says it wont work on new body trucks and hypertech doesnt say either way. The ol lady borrowed my truck n got a ticket so i figure if i can program my gasser and fix that issue even better. plus has anyone had issues with tire pressure monitoring system as fars as aftermarket tires and them not being rated for the tpms minimal rear tire pressure and if you know how or have connections to fix it