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 3 (ENGINE CONTROLS - REMOVAL & INSTALLATION - TRUCKS)FUEL SYSTEM (DIESEL)FUEL INJECTION LINESREMOVAL
1999 GMC Forward Control 5.7 R, Automatic
Fuel Injection Lines: Removal
1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal
WARNING: This page does not describe the selected car, but rather 29 other vehicles, including the 1999 Pontiac Montana, 1999 Oldsmobile Silhouette, 1999 Oldsmobile Bravada, 1999 GMC Yukon, and 1999 GMC Sonoma. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect negative battery cable. Remove air cleaner, noise cover and air inlet (if equipped). Remove fuel filler cap. Open air bleed valve on top of fuel manager/filter to release any pressure in fuel supply system. Remove fuel manager/filter. Remove generator rear bracket.
- Remove EGR/boost solenoids with bracket from intake manifold studs (if equipped). Disconnect crankcase depression regulator hose at manifold. Disconnect EGR and PCV hoses (if equipped). Remove fuel line bracket and ground strap. Remove intake manifold bolts and fuel line clips. Remove intake manifold and gasket. Install Protective Covers (J-29664-1) in intake ports.
- Remove injection line clips. Disconnect and cap injection lines at injector nozzles. Do not bend injection lines. Disconnect and cap injection lines at pump. Tag injection lines for reassembly reference. Cap all openings.
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.