Transmission: Overview

CHECKS DESCRIPTION
If you have completed the On-Board Diagnostic (OBD) system check, if the diagnostics are functioning properly and if no DTCs display, refer to the values in the Transmission Data Table for comparison. These typical values are an average of display values recorded from normally operating vehicles. They represent the display from a normally functioning system.

NOTE: Never use a scan tool that displays faulty data. The problem should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and the unnecessary replacement of parts.

Only the parameters listed below are used in this database for diagnosing. If a scan tool displays other parameters, the values are not recommended by General Motors for use in diagnosis.

Scan tool values in the Transmission Data Table were recorded under the following conditions:

^ Idle

^ Upper radiator hose is hot

^ Closed throttle

^ Park or Neutral

^ Closed Loop

^ Accessories OFF Brake not applied