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 734 (INSTRUMENT PANEL SYSTEM DISPLAYS, GAUGES AND CONSOLE)REPAIR INSTRUCTIONSDEFROSTER GRILLE REPLACEMENTREMOVAL PROCEDURE

1999 GMC Forward Control 5.7 R, Automatic

Removal Procedure

1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal Procedure

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.

Fig 1: Windshield Defroster Grille At I/P Upper Trim Pad

Courtesy of GENERAL MOTORS CORP.

Release and lift the windshield defroster grille from the I/P upper trim pad.
1. Insert two small flat bladed screwdrivers, or other suitable tools, close to each other between the rear edge of the defroster grille and the upper trim pad near one corner of the grille.
2. Begin to CAREFULLY pry the grille up from the trim pad.
3. Work the screwdrivers gradually to the other corner of the grille while continuing to CAREFULLY pry the grille up.
Lift the grille to access the DRL sensor and the sunload sensor, if equipped.
Rotate to release the DRL sensor from the grille, if equipped.

Fig 2: Sunload Sensor To Grille

Courtesy of GENERAL MOTORS CORP.

Rotate to release the sunload sensor from the grille, if equipped.

RENDER: 1.0x

NO RELATED

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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.