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 Chevrolet Optra Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Stationary Windows Component Views

Fig 1: Identifying PRNDL Lamp, Multifunction Alarm Module And Defrost Switch

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	PRNDL Lamp
2	Multifunction Alarm Module
3	Defrost Switch

Fig 2: View Of Rear Defog Grid And Antennas

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Rear Window (Glass Antenna)
2	Rear Defroster
3	Radio Antenna Module

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready Tools Compare Repair Quote Quote Shield Pro

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.