Two problems related to turn signal switch have been reported for the 1998 GMC Jimmy. The most recently reported issues are listed below.
Transmission oil cooling line is leaking from metal attachement. Please give any further details.
Unable to operate headlights and turn signals due to a defective multi-function switch. The windows only go down from the driver's door control because the window lock was shorted out. The mirror switch was burnt out. The serpentine belt was cracking. The oil cooling lines were leaking badly.