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 87 (ENGINE CONTROLS - REMOVAL, OVERHAUL & INSTALLATION)FUEL SYSTEMSTHROTTLE BODYREMOVAL (3.5L)
1999 GMC Forward Control 5.7 R, Automatic
Removal (3.5L)
1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal (3.5L)
WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue and 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
- Remove mounting the 2 mounting nuts from the injector sight shield (top engine cover). Lift the injector sight shield off the mounting studs by lifting at the front of the cover. Drain the radiator coolant. Remove the air cleaner intake duct. Disconnect the Idle Air Control (IAC) valve electrical connector.
- Disconnect the Throttle Position (TP) sensor electrical connector. Disconnect the cruise control cable from the throttle body lever. Disconnect the accelerator control cable from the throttle body lever. Disconnect the fuel pressure regulator vacuum hose. Disconnect the PCV valve hose.
- Disconnect the throttle body vacuum port hose. Disconnect the throttle body coolant hoses. Remove the accelerator controls cable bracket, leaving the accelerator and cruse cables connected. Remove the upper nut holding the throttle body to the intake manifold. Remove the throttle body assembly. Clean the gasket surface on the intake manifold and the throttle body assembly.
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.