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 618 (HVAC SYSTEMS - MANUAL)REPAIR INSTRUCTIONSVACUUM TANK REPLACEMENTREMOVAL PROCEDURE
1999 GMC Forward Control 5.7 R, Automatic
Removal Procedure
1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal Procedure
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the RH front tire and wheel assembly. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
- Remove the RH front wheelhouse filler panel. Refer to WHEELHOUSE FILLER REPLACEMENT in Body Front End.
- Remove the PCM. Refer to POWERTRAIN CONTROL MODULE .
- Tape off the rear edge of the RH fender and the front edge of the RH door to prevent scuffing.
- Open the RH door.
- Utilizing the opening between the fender and the door, remove the screws retaining the vacuum tank (1) to the hinge pillar (3).
- Working through the wheelhouse opening, disconnect the I/P harness vacuum connector (4) from the vacuum check valve (2).
- Disconnect the engine harness vacuum connector (5) from the vacuum check valve (2).
- Remove the vacuum tank (1) from the vehicle.
- Disconnect the vacuum check valve (2) from the vacuum tank (1).
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.