JACKING & HOISTING
Vehicle may be raised by floor jack or vehicle hoist. Ensure hoist or jack supports vehicle at proper lifting points. (Scheme 1)-6. If vehicle is to be raised on a twin-post hoist, use caution not to damage suspension, rear axle cover and/or steering linkage components.
Scheme 1
Scheme 1: JACKING & HOISTING
Scheme 2
Scheme 3
Scheme 4
Scheme 5
Scheme 6
CASTER & CAMBER ADJUSTMENT
Note. Before making any adjustments, check ride height of vehicle, and measure and record all alignment angles. See RIDE HEIGHT SPECIFICATIONS .
"C" & "K" SERIES
- Original control arm does not allow adjustment of camber and caster. Camber and caster may be adjusted only by using Adjustment Kit (G.M. 15538596). Raise vehicle and support under lower control arms. Remove and discard upper control arm-to-frame bracket bolts, nuts and washer.
- Remove large washers welded to upper control arm frame brackets. Remove weld beads from upper control arm bracket. Grind area smooth. Install adjustment cams to bracket. (Scheme 7)
- Install bolt. Adjust camber and caster to correct specifications by rotating bolt head. See «WHEEL ALIGNMENT SPECIFICATIONS»(/gmc/sonoma-syclone/1991-1992/remont/wheel-alignment/#wheel-alignment-specifications-procedures). Tighten nuts to specification. See «TORQUE SPECIFICATIONS»(/gmc/sonoma-syclone/1991-1992/remont/wheel-alignment/#wheel-alignment-specifications-procedures).
Scheme 7
ASTRO, SAFARI, "G", "P", "R" & "S" SERIES
Camber and caster angle may be adjusted using shims. (Scheme 8) Loosen upper control arm shaft-to-frame nuts. Remove original shims from bolts and add or remove shims to meet specification. See WHEEL ALIGNMENT SPECIFICATIONS. Tighten nuts to specification when servicing is complete. See TORQUE SPECIFICATIONS.
Scheme 8
Scheme 8: ASTRO, SAFARI, "G", "P", "R" & "S" SERIES
LUMINA APV, SILHOUETTE & TRANS SPORT
- Caster is not adjustable. Measure caster to check for bent or damaged parts. See «WHEEL ALIGNMENT SPECIFICATIONS»(/gmc/sonoma-syclone/1991-1992/remont/wheel-alignment/#wheel-alignment-specifications-procedures). Replace damaged components if necessary.
- For camber adjustment, loosen both strut-to-knuckle bolts enough to allow movement. (Scheme 9) Adjust camber to specification by moving top of wheel in or out. See «WHEEL ALIGNMENT SPECIFICATIONS»(/gmc/sonoma-syclone/1991-1992/remont/wheel-alignment/#wheel-alignment-specifications-procedures). Tighten strut-to-knuckle bolts to specification. See «TORQUE SPECIFICATIONS»(/gmc/sonoma-syclone/1991-1992/remont/wheel-alignment/#wheel-alignment-specifications-procedures).
Scheme 9
"V" SERIES
Caster and camber are not adjustable.
"T" SERIES
Caster and camber adjustments are made by means of cams on upper control arm frame attaching bolts. (Scheme 10) Loosen upper control arm-to-frame attaching nuts. Rotate cam by rotating bolt head. Adjust caster and camber to specification. See WHEEL ALIGNMENT SPECIFICATIONS.
Scheme 10
TOE-IN ADJUSTMENT PROCEDURES
Note. Tie rod adjuster parts often become rusted in service. If torque required to remove the nut from bolt after break-away exceeds 84 INCH lbs. (9 N.m), discard nuts and bolts and replace with correct numbered parts.
- Center the steering wheel and hold with steering wheel clamp. Loosen tie rod lock nuts or adjustment sleeve clamp bolts. Rotate inner tie rods or adjustment sleeves to align toe to specification. See «WHEEL ALIGNMENT SPECIFICATIONS»(/gmc/sonoma-syclone/1991-1992/remont/wheel-alignment/#wheel-alignment-specifications-procedures) .
- Ensure the number of threads showing on each tie rod or inside each adjustment sleeve is nearly equal. Ensure tie rod ends are square before tightening lock nuts. Tighten tie rod lock nuts or adjustment sleeve clamp bolts to specification. See «TORQUE SPECIFICATIONS»(/gmc/sonoma-syclone/1991-1992/remont/wheel-alignment/#wheel-alignment-specifications-procedures) .
PRE-ALIGNMENT CHECKS
Before making wheel alignment adjustments, check or adjust the following
- Tire pressure must be inflated to manufacturer's recommended specification. Tires should be equal in size and type. Runout must not be excessive. Tires and wheels should be in balance.
- Wheel bearings must be properly adjusted. Steering linkage and suspension must not have excessive wear and/or looseness. Check for wear in tie rod ends and ball joints.
- Steering gear box must not have excessive play. Check and readjust to manufacturer's specification.
- Vehicle must be at correct ride height with full fuel load and spare tire in vehicle. No extra load should be on vehicle. See «RIDE HEIGHT SPECIFICATIONS»(/gmc/sonoma-syclone/1991-1992/remont/wheel-alignment/#wheel-alignment-specifications-procedures__ride-height-specifications) .
- Vehicle must be level with floor and with suspension settled. Jounce front and rear of vehicle several times and allow it to settle to normal ride height.
- Ensure steering wheel spokes are centered with front wheels in straight-ahead position. Correct by shortening one tie rod adjusting sleeve and lengthening opposite sleeve in equal amounts.
- Ensure wheel lug nuts are tightened to proper specification. See «TORQUE SPECIFICATIONS»(/gmc/sonoma-syclone/1991-1992/remont/wheel-alignment/#wheel-alignment-specifications-procedures) .
RIDE HEIGHT SPECIFICATIONS
- Proper ride height is necessary for correct wheel alignment. Ensure tires are correctly inflated, cargo compartment is empty and fuel tank is full. Bounce vehicle several times to normalize ride height.
- Most vehicles provide front wheel alignment specifications which allow camber and caster adjustment for a large range of ride heights. See «RIDE HEIGHT SPECIFICATIONS»(/gmc/sonoma-syclone/1991-1992/remont/wheel-alignment/#wheel-alignment-specifications-procedures) table. Ride height measurement points are shown in illustrations. (Scheme 11)-16.
Scheme 11
Scheme 12
Scheme 13
Scheme 14
Scheme 15
Scheme 16
| Application | Ride Height Dimension: INCH (mm) |
|---|
| Astro & Safari |
| 2WD | 3.1 ± 0.2 (80 ± 6.0) |
| 4WD | 5.4 ± 0.2 (136 ± 6.0) |
| "C" & "K" Series |
| C15/35 | 3.7 ± 0.2 (95 ± 6.0) |
| K15/25 | 6.2 ± 0.2 (157 ± 6.0) |
| K35 | 5.7 ± 0.2 (145 ± 6.0) |
| "G", "P", "R" & "V" Series | (1) |
| Lumina APV, Silhouette & Trans Sport | 0 ± .04 (0 ± 1) |
| "S" Series | 2.8 ± 0.2 (73 ± 6.0) |
| "T" Series | 4.8 ± 0.2 (122 ± 6.0) |
| (1) Ride height is not adjustable. |
| (1) | Ride height is not adjustable. |
RIDE HEIGHT SPECIFICATIONS
| Application | Fraction | Decimal |
|---|
| Camber (Degrees) (1) | 13/16 ± 1/2 | (0.8 ± 0.5) |
| Caster (Degrees) (1) | 2 11/16 ± 1/2 | (2.7 ± 0.5) |
| Toe-in (Degrees) | 3/16 ± 1/8 | (.19 ± .13) |
| Toe-in (Inches) | 3/32 ± 1/16 | (.09 ± .06) |
| (1) Left and right adjustments must be within 0.5 degree of each other. |
| (1) | Left and right adjustments must be within 0.5 degree of each other. |
WHEEL ALIGNMENT SPECIFICATIONS (ASTRO & SAFARI)
| Application | Fraction | Decimal |
|---|
| Camber (Degrees) (1) | 1/2 ± 1/2 | (0.5 ± 0.5) |
| Caster (Degrees) (1) | 3 3/4 ± 1 | (3.75 ± 1.0) |
| Toe-in (Degrees) (2) | 7/32 ± 13/64 | (.24 ± 0.2) |
| (1) Left and right adjustments must be within 0.5 degree of each other. (2) Toe-in on left and right side must be set equally per wheel. Steering wheel must be held in straight-ahead position within plus or minus 5.0 degrees. |
| (1) | Left and right adjustments must be within 0.5 degree of each other. |
| (2) | Toe-in on left and right side must be set equally per wheel. Steering wheel must be held in straight-ahead position within plus or minus 5.0 degrees. |
WHEEL ALIGNMENT SPECIFICATIONS ("C" SERIES)
| Application | Fraction | Decimal |
|---|
| Camber (Degrees) (1) |
| K15/25 | 21/32 ± 1/2 | (.65 ± 0.5) |
| K35 | 1/2 ± 1/2 | (0.5 ± 0.5) |
| Caster (Degrees) (1) | 3 ± 1 | (3.0 ± 1.0) |
| Toe-in (Degrees) (2) | 7/32 ± 13/64 | (.24 ± 0.2) |
| (1) Left and right adjustments must be within 0.5 degree of each other. (2) Toe-in on left and right side must be set equally per wheel. Steering wheel must be held in straight-ahead position within plus or minus 5.0 degrees. |
| (1) | Left and right adjustments must be within 0.5 degree of each other. |
| (2) | Toe-in on left and right side must be set equally per wheel. Steering wheel must be held in straight-ahead position within plus or minus 5.0 degrees. |
WHEEL ALIGNMENT SPECIFICATIONS ("K" SERIES)
| Application | Fraction | Decimal |
|---|
| Camber (Degrees) |
| G15/25 | 1/2 ± 1/2 | (0.5 ± 0.5) |
| G35 | 1/4 ± 1/2 | (.25 ± 0.5) |
| P35 (w/ FS3) (1) (2) | 1 1/2 ± 1/2 | (1.5 ± 0.5) |
| P35 (w/out FS3) (1) | 3/32 ± 1/2 | (0.1 ± 0.5) |
| P35 (w/ JB8 or JF9) (1) | 3/32 ± 1/2 | (0.1 ± 0.5) |
| R15 | 11/16 ± 1/2 | (0.7 ± 0.5) |
| R25/35 | 1/4 ± 1/2 | (.25 ± 0.5) |
| "V" Series (2) | 1 ± 1/2 | (1.0 ± 0.5) |
| Caster (Degrees) | (3) | (3) |
| Toe-in |
| "G" Series (Degrees) | 0 ± 3/16 | (0.0 ± .19) |
| P35 (With FS3) (1) |
| Degrees | 1/16 ± 1/8 | (.07 ± .12) |
| Inches | 1/8 ± 1/16 | (.12 ± .06) |
| P35 (Without FS3) (1) |
| Degrees | 3/8 ± 1/8 | (.38 ± .13) |
| Inches | 1/4 ± 1/16 | (.18 ± .06) |
| P35 (With JB8 or JF9) (1) |
| Degrees | 1/2 ± 1/8 | (0.5 ± .12) |
| Inches | 1/4 ± 1/16 | (.25 ± .06) |
| "R" Series (Degrees) | 3/16 ± 1/8 | (.19 ± .13) |
| "R" Series (Inches) | 3/32 ± 1/16 | (.09 ± .06) |
| "V" Series (Degrees) | 1/8 ± 1/8 | (.13 ± .13) |
| "V" Series (Inches) | 1/16 ± 1/16 | (.06 ± .06) |
| (1) (Scheme 17)for explanation of Regular Production Option (RPO) codes. (2) For reference only. No means of adjustment is provided. (3) (Scheme 17)& 18 for caster specifications. |
| (1) | (Scheme 17)for explanation of Regular Production Option (RPO) codes. |
| (2) | For reference only. No means of adjustment is provided. |
WHEEL ALIGNMENT SPECIFICATIONS ("G", "P", "R" & "V" SERIES)
| Application | Fraction | Decimal |
|---|
| Camber (Degrees) (1) | 0 ± 1/2 | (0.0 ± 0.5) |
| Caster (Degrees) | 1 11/16 ± 1 | (1.7 ± 1.0) |
| Toe-in (Degrees) | 0 ± 3/16 | (0.0 ± .19) |
| (1) Left and right adjustments must be within .07 degree of each other. |
| (1) | Left and right adjustments must be within .07 degree of each other. |
WHEEL ALIGNMENT SPECIFICATIONS (LUMINA APV, SILHOUETTE & TRANS SPORT)
| Application | Fraction | Decimal |
|---|
| Camber (Degrees) (1) | 13/16 ± 1/2 | (0.8 ± 0.5) |
| Caster (Degrees) (1) | 2 ± 1/2 | (2.0 ± 0.5) |
| Toe-in (Degrees) (2) | 5/16 ± 3/32 | (.31 ± .09) |
| (1) Left and right adjustments must be within 0.5 degree of each other. (2) Toe in left and right side to be set separately per wheel and steering wheel must be held in straight ahead position within ± 5.0 degree. |
| (1) | Left and right adjustments must be within 0.5 degree of each other. |
| (2) | Toe in left and right side to be set separately per wheel and steering wheel must be held in straight ahead position within ± 5.0 degree. |
WHEEL ALIGNMENT SPECIFICATIONS ("S" & "T" SERIES)
| Application | Fraction | Decimal |
|---|
| Camber (Degrees) (1) | 3 1/2 ± 1/2 | (3.5 ± 0.5) |
| Caster (Degrees) (1) | 0 ± 1/2 | (0.0 ± 0.5) |
| Toe-in (Degrees) (2) | 5/32 ± 2/32 | (.16 ± .06) |
| (1) Left and right adjustments must be within 0.5 degree of each other. (2) Toe in left and right side to be set separately per wheel and steering wheel must be held in straight ahead position within ± 5.0 degree. |
| (1) | Left and right adjustments must be within 0.5 degree of each other. |
| (2) | Toe in left and right side to be set separately per wheel and steering wheel must be held in straight ahead position within ± 5.0 degree. |
WHEEL ALIGNMENT SPECIFICATIONS (SYCLONE)
Scheme 17
Scheme 18
TORQUE SPECIFICATIONS (ASTRO & SAFARI)
| Application | Ft. Lbs. (N.m) |
|---|
| Tie Rod Adjustment Sleeve Clamp Bolts | 13 (18) |
| Upper Control Arm Nuts |
| 2WD | 85 (115) |
| 4WD | 99 (135) |
| Wheel Lug Nuts | 90 (122) |
TORQUE SPECIFICATIONS (ASTRO & SAFARI)
TORQUE SPECIFICATIONS ("C" & "K" SERIES)
| Application | Ft. Lbs. (N.m) |
|---|
| Tie Rod Adjustment Sleeve Clamp Bolts | 14 (19) |
| Upper Control Arm Nuts (1) | 75-90 (100-122) |
| Wheel Lug Nuts |
| Dual Rear Wheels | 140 (190) |
| Single Wheels | 120 (163) |
| (1) Adjustment Kit (G.M. 15538596) must be used. |
| (1) | Adjustment Kit (G.M. 15538596) must be used. |
TORQUE SPECIFICATIONS ("C" & "K" SERIES)
TORQUE SPECIFICATIONS ("G", "P", "R" & "V" SERIES)
| Application | Ft. Lbs. (N.m) |
|---|
| Tie Rod Adjustment Sleeve Clamp Bolts |
| "V" Series | 40 (54) |
| All Others | 14 (19) |
| Upper Control Arm Nuts |
| G15/25 & R15 | 70 (95) |
| All Others | 105 (142) |
| Wheel Lug Nuts |
| G15/25 & R15 | 100 (136) |
| V15 (Aluminum) | 100 (136) |
| V15 (Steel) | 90 (122) |
| G35 & R/V 25/35 |
| Dual Wheels | 140 (190) |
| Single Wheels | 120 (163) |
| "P" Series |
| Dual Wheels (8 Studs) | 140 (190) |
| Dual Wheels (10 Studs) | (1) 175 (240) |
| Single Wheels | 120 (163) |
| (1) Tighten in 2 steps. Initially tighten all studs to 140 ft. lbs. (190 N.m), then tighten all studs to 175 ft. lbs. (240 N.m). |
| (1) | Tighten in 2 steps. Initially tighten all studs to 140 ft. lbs. (190 N.m), then tighten all studs to 175 ft. lbs. (240 N.m). |
TORQUE SPECIFICATIONS ("G", "P", "R" & "V" SERIES)
TORQUE SPECIFICATIONS (LUMINA APV, SILHOUETTE & TRANS SPORT)
| Application | Ft. Lbs. (N.m) |
|---|
| Strut-To-Knuckle Bolts | 140 (190) |
| Tie Rod Lock Nut | 45 (61) |
| Wheel Lug Nuts | 100 (136) |
TORQUE SPECIFICATIONS (LUMINA APV, SILHOUETTE & TRANS SPORT)
TORQUE SPECIFICATIONS ("S" & "T" SERIES)
| Application | Ft. Lbs. (N.m) |
|---|
| Tie Rod Adjustment Sleeve Clamp Bolts | 14 (19) |
| Upper Control Arm Nuts |
| "S" Series | 65 (88) |
| "T" Series | 70 (95) |
| Wheel Lug Nuts |
| Aluminum | 90 (122) |
| Steel | 73 (99) |
TORQUE SPECIFICATIONS ("S" & "T" SERIES)
