GM Lumina/Silhouette/Transport APVs 1990-1999 Repair Guide

Wheels

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Removal & Installation



  1. Park the vehicle on a level surface.
  2.  
  3. Remove the jack, tire iron and, if necessary, the spare tire from their storage compartments.
  4.  
  5. Check the owner's manual or refer to General Information and Maintenance of this repair guide for the jacking points on your vehicle. Then, place the jack in the proper position.
  6.  

See Figure 1

Click image to see an enlarged view

Fig. Fig. 1: Place the jack at the proper lifting point on your vehicle

  1. If equipped with lug nut trim caps, remove them by either unscrewing or pulling them off the lug nuts, as appropriate. Consult the owner's manual, if necessary.
  2.  
  3. If equipped with a wheel cover or hubcap, insert the tapered end of the tire iron in the groove and pry off the cover.
  4.  

See Figure 2

Click image to see an enlarged view

Fig. Fig. 2: Before jacking the vehicle, block the diagonally opposite wheel with one or, preferably, two chocks

  1. Apply the parking brake and block the diagonally opposite wheel with a wheel chock or two.
  2.  

Wheel chocks may be purchased at your local auto parts store, or a block of wood cut into wedges may be used. If possible, keep one or two of the chocks in your tire storage compartment, in case any of the tires has to be removed on the side of the road.

  1. Place the selector lever in P or Park.
  2.  
  3. With the tires still on the ground, use the tire iron/wrench to break the lug nuts loose. Do not remove them at this time.
  4.  

See Figure 3

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Fig. Fig. 3: With the vehicle still on the ground, break the lug nuts loose using the wrench end of the tire iron


WARNING
If a nut is stuck, never use heat to loosen it or damage to the wheel and bearings may occur. If the nuts are seized, one or two heavy hammer blows directly on the end of the bolt usually loosens the rust. Be careful, as continued pounding will likely damage the brake drum or rotor.

Sometimes wheels can be difficult to remove from the vehicle due to foreign material or a tight fit between the wheel center hole and the hub or rotor. These wheels can be removed without damage as follows:



Tighten all of the wheel nuts on the affected wheel, then loosen each wheel nut two turns.
 
Lower the vehicle onto the floor or ground.
 
Rock the vehicle from side to side as possible using 1 or more person's body weight to loosen the wheel and/or rock the vehicle from DRIVE to REVERSE allowing the vehicle to move several feet in each direction. Apply quick hard jabs on the brake pedal to loosen the wheel.
 
Raise the vehicle, remove the wheel nuts and the wheel.
 

To install:

Before installing the wheels, remove any build up of corrosion on the wheel mounting surface by scraping and wire brushing.



Install the wheel into position and screw the wheel nuts onto the studs with the cone shaped ends toward the wheel.
 
Tighten the wheel retaining nuts in sequence to 100 ft. lbs. (140 Nm).
 

The wheel nuts must be tightened in sequence and to the proper torque to avoid bending the wheel, brake drum or rotor.

  1. Using the jack, raise the vehicle until the tire is clear of the ground. Support the vehicle safely using jackstands.
  2.  
  3. Remove the lug nuts, then remove the tire and wheel assembly.
  4.  

See Figures 4, 5 and 6

Click image to see an enlarged view

Fig. Fig. 4: After the lug nuts have been loosened, raise the vehicle using the jack until the tire is clear of the ground



Click image to see an enlarged view

Fig. Fig. 5: Remove the lug nuts from the studs



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Fig. Fig. 6: Remove the wheel and tire assembly from the vehicle

To install:
  1. Make sure the wheel and hub mating surfaces, as well as the wheel lug studs, are clean and free of all foreign material. Always remove rust from the wheel mounting surface and the brake rotor or drum. Failure to do so may cause the lug nuts to loosen in service.
  2.  
  3. Install the tire and wheel assembly and hand-tighten the lug nuts.
  4.  
  5. Using the tire wrench, tighten all the lug nuts, in a crisscross pattern, (for 4 lug) or a `star' pattern (for 5 lug) until they are snug.
  6.  
  7. Raise the vehicle and withdraw the jackstands, then lower the vehicle.
  8.  
  9. Using a torque wrench, tighten the lug nuts in a crisscross pattern to 100 ft. lbs. (140 Nm). Check your owner's manual or refer to General Information and Maintenance of this repair guide for the proper tightening sequence.
  10.  

See Figure 7

Click image to see an enlarged view

Fig. Fig. 7: Typical wheel lug tightening sequence


WARNING
Do not overtighten the lug nuts, as this may cause the wheel studs to stretch or the brake disc (rotor) to warp.

  1. If so equipped, install the wheel cover or hubcap. Make sure the valve stem protrudes through the proper opening before tapping the wheel cover into position.
  2.  
  3. If equipped, install the lug nut trim caps by pushing them or screwing them on, as applicable.
  4.  
  5. Remove the jack from under the vehicle, and place the jack and tire iron/wrench in their storage compartments. Remove the wheel chock(s).
  6.  
  7. If you have removed a flat or damaged tire, place it in the storage compartment of the vehicle and take it to your local repair station to have it fixed or replaced as soon as possible.
  8.  

INSPECTION



Inspect the tires for lacerations, puncture marks, nails and other sharp objects. Repair or replace as necessary. Also, check the tires for treadwear and air pressure as outlined in General Information and Maintenance of this repair guide.

Check the wheel assemblies for dents, cracks, rust and metal fatigue. Repair or replace as necessary.

 
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