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 520 (BUMPER SYSTEM)REPAIR INSTRUCTIONSIMPACT BAR REPLACEMENT - FRONT BUMPERINSTALLATION 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 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.

Install the following components if removed:
Install the air deflector to the bumper impact bar. Refer to AIR DEFLECTOR REPLACEMENT - FRONT BUMPER FASCIA (PICKUPS AND UTILITIES) or AIR DEFLECTOR REPLACEMENT - FRONT BUMPER FASCIA (OPTIONAL) .
Install the license plate bracket. Refer to LICENSE BRACKET REPLACEMENT - FRONT .
Install the bumper impact bar to the vehicle.
NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Install the bolts and the nuts that retain the bumper impact bar to the frame.
Tighten

Tighten the bumper impact bar to the frame bolts to 40 N.m (30 lb ft).

Fig 1: Installing Nut & Bolt Retaining Brace To Bumper Impact Bar
Courtesy of GENERAL MOTORS CORP.
Install the fog lamp connectors, if equipped. Refer to the appropriate procedure in Lighting Systems.
- HEADLAMP ASSEMBLY OR HEADLAMP BULB AND/OR CORNERING, SIDEMARKER, PARK, TURN SIGNAL BULB REPLACEMENT
- FOG LAMP REPLACEMENT -- FRONT (XTREME)
Install the nuts and the bolts that retain the bumper impact bars to the brace.
Tighten

Tighten the bumper impact bar to the brace bolts to 40 N.m (30 Ib. ft).
Install the front wheel opening flare extension, if equipped. Refer to WHEEL OPENING FLARE REPLACEMENT -- FRONT (XTREME) or WHEEL OPENING FLARE REPLACEMENT -- FRONT (ALL EXCEPT XTREME AND ZR5) or WHEEL OPENING FLARE REPLACEMENT -- FRONT (ZR5) in Exterior Trim.
Install the radiator air intake baffle. Refer to AIR INLET GRILLE PANEL REPLACEMENT in Body Front End.
Install the grille. Refer to GRILLE REPLACEMENT (GMC) or GRILLE REPLACEMENT (CHEVROLET) in Exterior Trim.

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.