GM S-Series Pick-ups and SUV's 1994-1999 Repair Guide

Wheel Assembly

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REMOVAL & INSTALLATION



See Figures 1 through 11

The vehicles covered by this information use a variety of wheel styles, but from the factory they are all one piece rims with 5 bolt holes in a bolt circle of 5 in. (127mm). Wheels are also available in a variety of standard sizes from 14 x 6 in. (355.6 x 152.4mm) to 15 x 7 in. (381 x 177.8mm). Most vehicles are equipped with a space saver spare, for EMERGENCY USE ONLY, which comes in a 16 x 4 in. (406.4mm x 101.6mm) and 15 x 4 in. (381 x 101.6mm) sizes.

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Fig. Fig. 1: Some vehicles are equipped with a spare tire mounted to a hanger bracket under the bed



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Fig. Fig. 2: On some pick-up models the jack and tire iron are kept behind the passenger seat in a behind a cover



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Fig. Fig. 3: To access the jack, unscrew the cover retainer ...



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Fig. Fig. 4: ... then remove the cover



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Fig. Fig. 5: On some models a special tool is supplied to make wheel trim cover removal easier



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Fig. Fig. 6: Some models are equipped with a wheel chock, which is used to block the opposite wheel to the one you are removing. Use the chock if it is provided



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Fig. Fig. 7: If your model has the special wheel trim removal tool, use it to remove the wheel trim cover



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Fig. Fig. 8: Use the tire iron to slightly loosen the wheel lug nuts before raising the vehicle



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Fig. Fig. 9: Place the jack in the proper location and raise the vehicle until the wheel is off the ground



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Fig. Fig. 10: Unscrew the lug nuts and remove the tire from the vehicle



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Fig. Fig. 11: The lug nuts should be tightened to specification in a criss-cross pattern as illustrated

  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 Routine Maintenance of this repair guide for the jacking points on your vehicle. Then, place the jack in the proper position.
  6.  
  7. 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.
  8.  
  9. If equipped with a wheel cover or hub cap, insert the tapered end of the tire iron in the groove and pry off the cover.
  10.  
  11. Apply the parking brake and block the diagonally opposite wheel with a wheel chock or two.
  12.  

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. If equipped with an automatic transmission, place the selector lever in P or Park; with a manual transmission, place the shifter in Reverse.
  2.  
  3. With the tires still on the ground, use the tire iron/wrench to break the lug nuts loose.
  4.  

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.

  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.  

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, until they are snug.
  6.  
  7. Raise the vehicle and withdraw the jackstand, then lower the vehicle.
  8.  
  9. Using a torque wrench, tighten the lug nuts in a crisscross pattern to 95 ft. lbs. (130 Nm) on 1994-98 models and 103 ft. lbs. (140 Nm) on 1998-99 models. Check your owner's manual or refer to Routine Maintenance of this repair guide for the proper tightening sequence.
  10.  


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 hub cap. 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 Routine 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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