GM S10/S15/Sonoma Pick-Ups 1982-1993 Repair Manual

Fuse Block and Fuses


See Figures 1, 2 and 3

The fuse block on most models covered by this manual is located under the instrument panel to the left of the steering column. The fuse block should be visible from underneath the steering column, near the pedal bracket. If the panel is not visible, check for a removable compartment door or trim panel which may be used on later models to hide the block.

Each fuse block uses miniature fuses (normally plug-in blade terminal type for these vehicles) which are designed for increased circuit protection and greater reliability. The compact plug-in or blade terminal design allows for fingertip removal and replacement.

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Fig. Fig. 1: View of an early model fuse block-notice that most terminals are labelled

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Fig. Fig. 2: Common early model fuse block and components

Although most fuses are interchangeable in size, the amperage values are not. Should you install a fuse with too high a value, damaging current could be allowed to destroy the component you were attempting to protect by using a fuse in the first place. The plug-in type fuses have a bold number molded on them and are color coded for easy identification. Be sure to only replace a fuse with the proper amperage rated substitute.

A blown fuse can easily be checked by visual inspection or by continuity checking.

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Fig. Fig. 3: Common late model fuse block


See Figure 4

  1. Pull the fuse from the fuse block.
  3. Inspect the fuse element (through the clear plastic body) to the blade terminal for defects.

When replacing the fuse, DO NOT use one of a higher amperage.

  1. Once repairs are completed, install a replacement fuse of the same amperage.

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Fig. Fig. 4: Visual examination will reveal a blown fuse, but it should not be replaced until repairs are made