GM Leaf Spring 2″, 4″, 6″, 8″ Suspension Systems
Installation Instructions Front
1. Raise vehicle and place jack stands under frame approximately 3” behind front spring shackles. Remove front wheels and shocks.
2. Remove one rivet from the outside of the frame at the engine cross member closest to the OE hose to steel line connection. Attach the 90 degree brake line extension brackets using the 3/8” x ” bolts, nuts, and lock washers.
3. Disconnect front brake line at frame and reroute through extension brackets and secure. CAUTION: Careful attention must be exercised in rerouting. Do not kink, pinch or stretch lines! When both sides have been completed, bleed the brakes. Refill the master cylinder with Dot ap- proved fluid.
4. Place hydraulic floor jack under front differential and rise to support differential.
5. Remove cotter pin and nut securing the drag link to stock steering arm. Use pickle fork to de-seat tapered stud from arm. (Fig. )
6. Remove front spring to axle u-bolts. (Fig. 2) Remove spring to front hanger bolts, and shackle bolts. (Fig. 3) Save all hardware for reinstall. Remove front springs. 6” and up lift kits, remove sway bar to frame bushing bolts, save all hardware for reinstall. Support sway bar with strap to frame, or with jack stand.
7. Lubricate spring bushings and install into front lift springs. Large bushing and ¾” steel sleeve into front eyes. Small bushing and ½” steel sleeve into rear eyes.
8. Install front springs assemblies into vehicle using OEM fasteners removed in step 5. If new hardware is needed it is available from BDS # 2 004 for 973-87 trucks or # 2 005 for 988-9 trucks. Leave spring eye bolts hand tight to be tightened with truck on the ground.
9. Fully seat spring center pins into axle spring seat and secure springs to axle using the longer u-bolts, nuts, and washers supplied. (Fig 4.) Do not Torque hardware at this time. 6” and up lift kits Install sway bar drop kit # 2 45 per instructions at this time.
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