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Rear View Mirror Outside Temp Sensor


Charter Member
SM 2003
Full Member
Jan 26, 2002
Los Angeles, California
Anybody know where the outside temperature sensor is located. This is the sensor which feeds the Rear View Mirror display.

Reason I am asking is because ever since I installed a length of rubber weatherstripping under the front portion of the hood, the temp reading is unrealistically higher on the display. I would imagine the sensor is probably in that vicinity.

????? :rolleyes:
I hope this helps :D

Owners of some 2001 Chevrolet
Silverado or GMC Sierra trucks may
comment that the ambient temperature
reading in the rearview mirror is
too high when the winter front is
installed over the radiator grille to
restrict air flow into the radiator and
increase engine temperature. The sensor
is reading the engine compartment
temperature instead of the
ambient temperature due to its location.
Reposition the ambient temperature
sensor to an existing hole on the
radiator support under the left turn signal
assembly. This hole is exactly
opposite the location used to install
the air temperature sensor under the
right turn signal assembly.
Relocating the sensor will eliminate
the bracket in the original location.
The wiring harness will now be
12 inches (304.8 mm) longer than
needed. Neatly bundle the excess
wire and install a suitable tie.
Affected Models:
2001 Chevrolet Silverado C2, C3
2001 Chevrolet Silverado K2, K3
2001 GMC sierra C2, C3
2001 GMC sierra K2, K3
? GM Technical Assistance