GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2006 🢒 Colorado Pickup - 4WD 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Speedometer and/or Odometer Inaccurate or Inoperative

Diagnostic Aids

Check for the following DTCs:

    •  DTC B1000 , DTC B1007 , and DTC B1009
    •  DTC U1000 and U1255 and DTC U1001-U1254

Test Description

The number below refers to the step number on the diagnostic table.

  1. This test procedure may cause DTCs to set, which may cause other systems to be inoperative or disabled.

Step

Action

Yes

No

Schematic Reference: Instrument Cluster Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2
  1. Install a scan tool.
  2. Raise the vehicles drive wheels. Refer to Lifting and Jacking the Vehicle .
  3. Start the engine.
  4. Place the transmission into drive.
  5. With the scan tool, observe the Vehicle Speed Sensor (VSS) parameter in the powertrain control module (PCM) evaporative emission (EVAP) Data, data list.

Does the VSS parameter match the speedometer display?

Go to Step 3

Go to Step 4

3

Does the odometer operate properly?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 4

4

Replace the instrument panel cluster (IPC). Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 5

--

5

  1. Operate the system in order to verify the repair.
  2. Use the scan tool in order to clear the DTCs that may have set in other modules during diagnosis.

Did you correct the condition?

System OK

Go to Step 2