Upper Control Arm: Installation

If upper control arm bumper is deteriorated or damaged, install NEW bumper. Mount upper control arm on vehicle. On Bravada, Jimmy, Sonoma, Typhoon and "T" Series Blazer & Pickup, install pivot bolts, alignment adjustment cams and NEW pivot bolt nuts. On Astro, "K" Series Blazer & Pickup, Safari, Sierra, Suburban and Yukon, install pivot bolts, washers and new pivot bolt nuts.
CAUTION: When installing upper ball joint stud nut, tighten nut to align cotter pin hole. DO NOT tighten ball joint stud nut more than an additional 1/6 turn to align cotter pin hole. Complete tightening of upper ball joint stud nut with vehicle at proper riding height specification.
On all models, ensure pivot bolts heads are facing inward. Connect steering knuckle to upper ball joint studs. To complete installation, reverse removal procedure. Tighten bolts and nuts to specification. See appropriate TORQUE SPECIFICATIONS table at the end of this article. Lower vehicle. Check wheel alignment and adjust ride height. See SPECIFICATIONS & PROCEDURES article in WHEEL ALIGNMENT. Complete tightening of upper control arm pivot bolts and nuts with vehicle at proper riding height specification.

Fig 1: Exp. View Of Upper Control Arm (Astro, "K" Series Blazer & Pickup, Safari, Sierra, Suburban & Yukon)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Exploded View Of Upper Control Arm (Bravada, Jimmy, Sonoma Typhoon & "T" Series Blazer & Pickup)

Courtesy of GENERAL MOTORS CORP.