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.

2004 Saturn Ion Red LineFACTORY OEM SERVICE PROCEDURE

Removal Procedure

WARNING: This page is about a different car, the 2005 Saturn Ion Red Line, 2005 Saturn Ion 3, 2005 Saturn Ion 2, and 2005 Saturn Ion 1. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
Remove the front floor console. Refer to Console Replacement - Front Floor in Instrument Panel, Gages, and Console.
Remove the wiring harness rosebud from the right center support bracket.

Fig 1: View Of Wiring Harness Center Support Bracket

GM877821

Courtesy of GENERAL MOTORS CORP.

Pull back the carpet at the bottom of the support bracket and remove the lower nuts.

Fig 2: View Of Center Support Bracket

GM877820

Courtesy of GENERAL MOTORS CORP.

Remove the nuts and remove the bracket.
Disconnect the small body harness connector (1) from the body control module (BCM).

Fig 3: View Of BCM Body Harness Connectors

GM877745

Courtesy of GENERAL MOTORS CORP.

Disconnect the large body harness connector (2) from the BCM.
Disconnect the small instrument panel (I/P) wiring harness connector (1) from the BCM.

Fig 4: View Of BCM I/P Wiring Harness Connectors

GM877747

Courtesy of GENERAL MOTORS CORP.

Disconnect the large I/P wiring harness connector (2) from the BCM.
If equipped with Onstar®, disconnect the OnStar® connector.
Remove the BCM nuts and remove the BCM from the vehicle.

Fig 5: View Of BCM

GM877750

Courtesy of GENERAL MOTORS CORP.

Factory Service Tools

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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.

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