For 1990-2009 cars

# Steering

## All Component Locator

- Steering Controls Components

## All Description and Operation

- General Description
- Variable Effort Steering Circuit Operation

## All Visual Identification

- Steering Assist Connector End Views

## Diagnostic Trouble Codes

- DTC 21 No Speed Signal
- DTC 22 Solenoid Circuit Short to Ground/Open
- DTC 23 Power Steering Control Module Malfunction

## Electrical/Electronic Schematic Diagrams

- Steering Assist Schematic Icons
- Steering Assist Schematics
- Steering Controls Schematic References

## General Diagnostic Information

- Diagnostic Trouble Code (DTC) List
- Variable Effort Steering Diagnosis
- Variable Effort Steering System Check

## Other Specifications

- GM SPO Group Numbers

## Removal, Installation, and Replacement

- Power Steering Control Module Replacement