Colorado 4WD L5-3.5L VIN 6 (2005)
Throttle Body: Description and Operation
THROTTLE BODY ASSEMBLY
The throttle body for the throttle actuator control (TAC) system is similar to a conventional throttle body with several exceptions. One exception being
the use of a motor to control the throttle position instead of a mechanical cable. Another exception is the throttle position (TP) sensor. The TP sensor is
mounted in the throttle body assembly. The TP sensor is 2 individual TP sensors within the throttle body assembly. Two separate signals, low reference,
and 5-volt reference circuits are used to connect the TP sensors and the powertrain control module (PCM). TP sensor 2 signal voltage increases as the
throttle opens. TP sensor 1 signal voltage decreases as the throttle opens.