Service 4wd (if equipped), Low washer fluid – GMC 2002 Sierra User Manual

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Service 4WD (If Equipped)

If the SERVICE 4WD
message comes on, there
may be a problem with the
automatic transfer case and
service is required.

Malfunctions can be indicated by the system before
any problem is apparent, which may prevent serious
damage to the vehicle. This system is also designed
to assist your service technician in correctly diagnosing
a malfunction.

Low Washer Fluid

This message is displayed
when the vehicle is low
on windshield washer
fluid. The message is only
displayed for 15 seconds
at the start of each
ignition cycle.

For more information see, “Windshield Washer Fluid” in
the Index.