I bought a body control module (goes in fuse box under rear left seat, had it flashed and the mileage stayed at 160 my mileage is supposed to be 120 but the bcm that i bought with 120 on it did nothing even when it was flashed at the dealership. now there telling me its stored in the odometer cluster ???? help please
There is no way to change milage.and also it's against the law to mess with the milage .and there is no cpm or computer out there to change milage.
This is right from GMC service repair manual
Odometer
The vehicle odometer is calculated and stored electronically in the instrument panel cluster (IPC). The base IPC contains a season odometer and a trip odometer. The uplevel IPC contains a season odometer and two trip odometers. Momentarily press the trip/reset switch on the IPC in order to toggle between the season odometer and the trip odometer. Press the trip/reset switch for greater than 2 seconds, while the trip odometer is displayed, in order to reset the trip odometer.
The IPC calculates the mileage based on the vehicle speed signal circuit from the engine control module (ECM). The odometer will display 'error' if an internal IPC memory failure is detected. The odometer displays either miles or kilometers as requested by the activation of the Personalization button on the steering wheel controls.
SOURCE: DISABLING SERVICE RIDE CONTROL via REPROGRAMMED BCM
bottom of sterring colum under under trim panel
SOURCE: Needing to know what a BCM(Body Control Module) does.
it control warning
door locks
lights
alarm
F1.8 10 Electronic Automatic Temperature Control (EATC) module (19980), Exterior
rear view mirror, left, Exterior rear view mirror, right
F1.5 7.5 Powertrain Control Module (PCM) (12A650), Deactivator switch, Third row
folding seat relay, left, Third row folding seat relay, right, Power lift gate
module, Brake pedal position switch (13480), Sunload sensor (19E663),
Clock (15000), Function selector switch assembly, front, Electronic Automatic
Temperature Control (EATC) module (19980). Don't think you have a fuse problem ! More then likely the HVAC control module is bad , they do go bad
Don't
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