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Home >> GMC >> 1987 >> Forward Control 5.7 M, Standard >> Repair and Diagnosis >> Suspension >> Wheel Alignment >> Wheel Alignment Specifications & Procedures >> Adjustments >> Caster Adjustment
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Caster Adjustment

To decrease positive caster, transfer one or more shims from between rear upper control arm bolt and frame to front bolt and vise versa. See Figure . If a normal shim pack will not bring vehicle within specifications, check for damaged control arms and related parts.