Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 724 (ANTILOCK BRAKE SYSTEM, TRACTION CONTROL SYSTEM & STABILITY CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESVEHICLE STABILITY ENHANCEMENT SYSTEM INOPERATIVETEST DESCRIPTION
1999 GMC Forward Control 5.7 R, Automatic
Test Description
1999 GMC Forward Control 5.7 R, AutomaticSECTION Test Description
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic table.
- 3: Perform the Steering Position Sensor Test in order to verify if the steering wheel position sensor (SWPS) is operating properly.
- 4: Verify that the lateral accelerometer input parameter is within the valid range.
- 5: Verify that the yaw rate input parameter is within the valid range.
Vehicle Stability Enhancement System Inoperative
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: ABS Schematics | ||||
| 1 | Did you perform the ABS Diagnostic System Check? | - | Go to Step 2 | Go to Diagnostic System Check - ABS |
| 2 |
|
30 seconds | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | With the scan tool, perform the With the scan tool, perform the Steering Position Sensor Test. Did the SWPS pass the test? |
- | Go to Step 4 | Go to Step 7 |
| 4 | With a scan tool, observe the Lateral Accelerometer Input parameter in the VSES data list. Does the scan tool display within the specified range? |
2.3-2.7 V | Go to Step 5 | Go to Step 8 |
| 5 | With a scan tool, observe the Yaw Rate Sensor Input parameter in the VSES data list. Does the scan tool display within the specified range? |
2.3-2.7 V | Go to Step 6 | Go to Step 9 |
| 6 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Did you complete the replacement? |
- | Go to Step 10 | - |
| 7 | Replace the steering wheel position sensor (SWPS). Refer to Steering Shaft, Lower Bearing, and Jacket Replacement (Telescoping)
or Steering Shaft, Lower Bearing, and Jacket Replacement (Manual)
in Steering Wheel and Column. Did you complete the replacement? |
- | Go to Step 10 | - |
| 8 | Replace the lateral accelerometer sensor. Refer to Lateral Accelerometer Replacement . Did you complete the replacement? |
- | Go to Step 10 | - |
| 9 | Replace the yaw rate sensor. Refer to Yaw Rate Sensor Replacement . Did you complete the replacement? |
- | Go to Step 10 | - |
| 10 | Operate the system in order to verify the repair. Did you correct the condition? |
- | System OK | Go to Step 2 |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.