GMC 1999 Jimmy Owner's Manual page 12

Heated Front Seats (If Equipped)
Press the lower part of the switch to turn the heater on
low. Press the upper part of the switch to turn the heater
on high. Put the switch in the center position to turn the
heater off.
The passenger's safety belt must be engaged for the
heated seat feature to work on the passenger's seat.
1-6
If you have this feature, the
control is located on the
side of the seat. This feature
will quickly heat the lower
cushion and lower back of
the driver and front
passenger seats for
added comfort.
Reclining Front Seatbacks
To adjust the seatback, lift the lever on the outer side of
the seat.
Release the lever to lock the seatback where you want it.
Pull up on the lever and the seat will go to an
upright position.
yellowblue