GM Buick/Oldsmobile/Pontiac/Full-Size 1975-1990 Repair Guide




See Figures 1, 2 and 3

The fuse block on most of the models covered in this guide is located underneath the far left side of the instrument panel, up towards the floor mat. On a few vehicles, it is located adjacent to the steering column and swings down. Two types of fuses have been used since 1975: the conventional type (cylindrical) fuse, found on 1975 through 1978 vehicles, and the new mini fuses, found on 1978 and later models. The conventional fuses are held in the fuse block by small tangs, and are best removed with a small prybar or awl. The mini fuses are simply pushed into their respective places in the block.

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Fig. Fig. 1: This fuse block location is common to most models

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Fig. Fig. 2: Close-up view of a mini-fuse type block

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Fig. Fig. 3: Mini type fuse application chart

To determine whether either type of fuse is blown, remove the suspect fuse and examine the element in the fuse for a break. If the element (the strip of silver metal inside) is broken, replace the fuse with one of equal amperage. Some fuses have their amperage value molded into the fuse end, and others (and all of the mini fuses) have a color coding system. Color codes are as follows:

3 amps Purple
5 amps Tan
7.5 amps Brown
10 amps Red
20 amps Yellow or Clear
25 amps White
30 amps Green