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

Belts

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INSPECTION



See Figures 1 through 5

Inspect the belts for signs of glazing or cracking. A glazed belt will be perfectly smooth from slippage, while a good belt will have a slight texture of fabric visible. Cracks will usually start at the inner edge of the belt and run outward. All worn or damaged drive belts should be replaced immediately. It is best to replace all drive belts at one time, as a preventive maintenance measure, during this service operation.



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Fig. Fig. 1: There are typically 3 types of accessory drive belts found on vehicles today



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Fig. Fig. 2: An example of a healthy drive belt



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Fig. Fig. 3: Deep cracks in this belt will cause flex, building up heat that will eventually lead to belt failure



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Fig. Fig. 4: The cover of this belt is worn, exposing the critical reinforcing cords to excessive wear



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Fig. Fig. 5: Installing too wide a belt can result in serious belt wear and/or breakage

ADJUSTMENT



See Figure 6



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Fig. Fig. 6: Check the belt tension by simply observing the range indicator located on the tensioner spindle

Serpentine belts are automatically tensioned by a system of idler and tensioner pulleys, thus require no adjustment. The serpentine belt tension can be checked by simply observing the belt acceptable belt wear range indicator located on the tensioner spindle. If the belt does not meet the specified range, it must be replaced.

A belt is considered "used'' after 15 minutes of operation.

REMOVAL & INSTALLATION



See Figures 7 through 12



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Fig. Fig. 7: A decal showing the belt routing may sometimes be found under the hood



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Fig. Fig. 8: Relieve the belt tension and remove the belt-1994 4.3L model shown



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Fig. Fig. 9: On some 2.2L engines it may be easier to attach the breaker bar to the tensioner arm from under the vehicle to relieve belt tension



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Fig. Fig. 10: Relieve the belt tension and remove the belt-1996 4.3L model shown



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Fig. Fig. 11: Serpentine belt routing-4.3L engine



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Fig. Fig. 12: Serpentine belt routing-2.2L engine

  1. On 1994-97 2.2L engines and 1994-96 4.3L engines, using a 1 / 2 in. breaker bar and if necessary, with a socket placed on the tensioner pulley bolt, rotate the tensioner counterclockwise to relieve the belt tension. On some 2.2L engines it may be easier to attach the breaker bar to the tensioner arm from under the vehicle.
  2.  
  3. On 1998-99 2.2L engines and 1997-99 4.3L engines, using a 3 / 8 in. breaker bar, rotate the tensioner counterclockwise to relieve the belt tension. On some 2.2L engines it may be easier to attach the breaker bar to the tensioner arm from under the vehicle.
  4.  
  5. Remove the serpentine belt.
  6.  

To install:
  1. Route the belt over all the pulleys except the tensioner.
  2.  
  3. Place the breaker bar and if necessary the socket, on the tensioner pulley bolt and rotate the tensioner counterclockwise to the released position.
  4.  
  5. Install the belt and return the pulley slowly to its original position. Do not let the pulley snap back into position as this may damage the belt and pulley.
  6.  
  7. Check that the belt is properly seated in each pulley.
  8.  

 
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