Driver info center odometer

Your best bet ,take it to a qualified repair shop .

Odometer
The instrument panel cluster (IPC) contains a season odometer and a trip odometer. Momentarily press the trip/reset switch 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 odometer is calculated and stored electronically in the body control module (BCM). The BCM uses the vehicle speed information from the powertrain control module (PCM) to calculate the odometer. The odometer displays 'error' if an internal IPC memory failure is detected. The IPC stores a backup copy of the odometer value incase the IPC stops receiving a valid odometer value from the BCM.

Hooking up a scan tool to check codes Would the first step . A professional scan tool , one that can read codes in IPC / BCM . Auto zone can't check these , nor advance ,nor o' Reilly part stores You have no idea of the complexity of the electronics on that vehicle .

You fell into the "Let's try replacing this" method of car repair Gina. It doesn't work and is expensive. A pro grade bi-directional scan tool computer can diagnose faulty solenoids by instructing them to operate and verify that they have. The Odometer display is instructed by the ECM which also talks to the Transmission Control Module. You have a computer issue not a mechanical issue.

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Did you check the fuse that supply's battery voltage to pin # 16 at the DLC - diagnostic link connector ? That's where you plug your code reader in . The lighter fuse - 15 amp located in the under hood fuse box supply's battery voltage to pin #16 . The fuel gauge not working could be any one of a number of thing's , without testing an checking for DTC'S - diagnostic trouble code's I would only be guessing . Checking code's in the instrument cluster an PCM should be done by a qualified repair shop. The fuel level sending unit in the fuel tank is a direct input to the PCM/ECM - engine computer , the PCM / ECM sends this info too

The instrument panel cluster (IPC) displays the fuel level as determined by the powertrain control module (PCM)/engine control module (ECM). The IPC receives a GMLAN message from the body control module (BCM) indicating the fuel level volume. The fuel gage defaults to empty (E) if:
• The PCM/ECM detects a malfunction in the fuel level sensor circuit.
• The IPC detects a loss of GMLAN communications with the BCM.
When the fuel level is less than a certain low percentage, LOW FUEL message displays in the driver information center (DIC).

Odometer
The vehicle odometer is calculated and stored electronically in the body control module (BCM) and is sent via GMLAN to the instrument panel cluster (IPC) for display. The BCM calculates and stores the mileage based on the vehicle speed GMLAN message from the powertrain control module (PCM)/engine control module (ECM). The IPC displays the season odometer information from the BCM in the driver information center (DIC). The odometer will display error if the IPC detects an invalid odometer data from the BCM. After an invalid odometer data is received from the BCM, the IPC will display the last known odometer reading for 1.5 seconds before error is displayed in the DIC.

These can set a few different DTC'S

DTC B0158
DTC B2961
DTC P0461 (2.0L and 2.2L)
DTC P0461 (2.4L)
DTC P0462 (2.0L and 2.2L)
DTC P0462 (2.4L)
DTC P0463 (2.0L and 2.2L)
DTC P0463 (2.4L)
DTC P0464
DTC P0520


So , i suggest you take your vehicle to a qualified repair shop.

Go into the driver info center and bring up the speedo settings, it is there.

use a code reader to reset the CPU.

The number 8 means that the digital display in between the speedometer and tachometer is reading your speed. It you set your display to trip odometer to trip one it will read 1, trip odometer 2 will read 2, fuel economy will read another number. and finally navigation will read 9.

You can use the odometer correction tool @http://www.obd2express.co.uk/wholesale/odometer-correction-tool/ to fix it, it is easy to fix.

The IPC displays the season odometer information from the BCM in the driver information center (DIC). The odometer will display an error if the IPC detects invalid odometer data from the BCM.
You'll need to find a 10 AMP fuse in the instrument panel cluster, follow this diagram t locate it: https://ricksfreeautorepairadvice.com/2003-chevrolet-silverado-fuse-diagram/

Yes take your battery terminals off and hold them together for about 10 seconds that will reset your computer.

If your colorado has a drivers info center you can do it through the dash yourself. It will be in the owners manuel. If it does not have the info center you will need to take it to a dealer and it will take just a few minutes to do with their scan tool. Good Luck