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 460 (BODY FRONT END)REPAIR INSTRUCTIONSBRACE REPLACEMENT - FRONT FENDER UPPER DIAGONAL - RIGHTINSTALLATION PROCEDURE

1999 GMC Forward Control 5.7 R, Automatic

Installation Procedure

1999 GMC Forward Control 5.7 R, AutomaticSECTION Installation Procedure

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

Position the front end sheet metal diagonal brace to the radiator support and to the inner fender.

Fig 1: Positioning Front End Sheet Metal Diagonal Brace
Courtesy of GENERAL MOTORS CORP.
Install the bolts to the front end sheet metal diagonal brace at the radiator support.
Tighten

Tighten the front end sheet metal diagonal brace at radiator support bolts to 10 N.m (89 lb in).
Install the bolts to the front end sheet metal diagonal brace at the inner fender.
Tighten

Tighten the front end sheet metal diagonal brace to the inner fender bolts to 10 N.m (89 lb in).

Fig 2: Installing Front End Sheet Metal Diagonal Brace Bolts
Courtesy of GENERAL MOTORS CORP.
Reposition the underhood wiring junction block to the front fender diagonal brace. Refer to UNDERHOOD ELECTRICAL CENTER OR JUNCTION BLOCK REPLACEMENT .
Close the hood.

Fig 3: Repositioning Underhood Wiring Junction Block
Courtesy of GENERAL MOTORS CORP.

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.