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 347 (REAR SUSPENSION SYSTEM)REPAIR INSTRUCTIONSREAR AXLE UPPER CONTROL ARM 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.
NOTE:
Tools Required
- J 42188 Ball Joint Separator
- Raise and support the vehicle.
- Remove the tire and wheel assembly. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in TIRES AND WHEELS article.
- Disconnect the wheel speed sensor electrical connector. See Figure.
- Disconnect the electronic suspension control (ESC) position sensor link, if equipped. See Figure.
- Separate the suspension knuckle (1) from the upper control arm using J 42188. See Fig 1.
- Support the lower control arm with a jack stand.
- Loosen the upper ball joint stud nut, but do not remove the nut.
- Remove J 42188 and the ball joint stud nut (2) from the ball joint stud. See Fig 1.
- Remove the bolts (1) and (2) retaining the upper control arm (3) to the frame. See Fig 2.
- Remove the upper control arm (3) from the vehicle.
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.