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 91 (ENGINE CONTROLS - REMOVAL & INSTALLATION, OVERHAUL)IGNITION SYSTEMSSPARK PLUGSREMOVAL (3.1L)

1999 GMC Forward Control 5.7 R, Automatic

Removal (3.1L)

1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal (3.1L)

WARNING: This page is about a different car, the 2002 Pontiac Grand Prix, 2002 Chevrolet Monte Carlo, 2002 Chevrolet Impala, 2002 Buick Regal, and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

Turn OFF the ignition. To remove spark plugs from left cylinder bank (front cylinder head), remove the spark plug wires from spark plugs. Remove spark plugs from engine. To remove spark plugs from the right cylinder bank (rear cylinder head), remove the throttle body air inlet duct.

NOTE: Engine must be rotated for service access.

Remove wiper motor cover assembly. See appropriate WIPER/WASHER SYSTEMS article in ACCESSORIES & EQUIPMENT. Set the park brake. Shift the transaxle into Neutral. Remove the engine mount strut bolts. See Fig 1. Swing the engine mount struts aside. Install the Engine Tilter Strap (J-41131) to the engine. See Fig 2.
Pull on the engine in order to rotate the engine forward. Tighten the engine tilter strap. Remove the spark plug wires from the spark plugs. Remove the spark plugs from the engine.

Fig 1: Removing Left Engine Mount Strut Bolt (3.1L - Right Is Similar)

Courtesy of GENERAL MOTORS CORP.

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.