GMC 2003 GMT560 T-Series Owner's Manual page 225

Instrument Panel Fuse Block and
Maxi-Fuse Block
There are two fuse blocks in your vehicle: the instrument
panel fuse block and the maxi-fuse block.
The fuse block is located on the top of the instrument
panel on the passenger's side of the vehicle.
To access the fuse block, remove the cover by lifting up
on the front and turning it backward.
To reinstall the cover, put the tabs at the rear of the
cover into the slots on the instrument panel and lower
the cover down to snap into place.
If you ever have a problem on the road and don't have
a spare fuse, you can borrow one of the correct
value. Just pick some feature of your vehicle that you
can get along without, like the radio or cigarette lighter,
and use its fuse if it is the value you need. Remember
to replace the fuse as soon as you can.
These fuses are non-cycling; do not replace them with
cycling fuses. Also, do not use fuses of a higher
amperage than those listed on the circuit breaker block.
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