Car Questions
RepairPal is your advocate for car care advice and guidance

What part does The TAC(Tac Module Throttle Actuator)play in truck performance?

(2003 GMC Sierra 2500 HD)
in Memphis, TN on March 02, 2013
Truck recently cut off when making a turn got 2 boost offs and barely made it home, carmd says throttle actuator motor CKT 1 is open shorted to ground b and throttle actuator motor Ckt2 is open ,shorted to ground b throttle actuator motor is damaged or has failed. throttle actuator motor control motor has failed.What would be the solution? Diagnois P1516 and condition for setting code is DTC 1518 not set,keyin crak or run mode, ETC saver Mode, the the ETC/TAC module detected the position were not within a calibrated range of each other could not determine the throttle position
Displaying 2 answers & 1 comments
Popular Answer
on March 02, 2013
Did carMD offer a solution? Sounds like a mass air flow sensor/, OR a throttle position sensor problem which is part of the throttle body assembly. Or the circuit. See a carMEchanic and let him check it out, may check for tsb.
on March 04, 2013
Thanks for the help will do
on January 26, 2016
Throttle is fly by wire with 2sensors one on firewall one on the throttle body. If they're not in sync truck will usually say reduced engine power.
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
where is the throttle position sensor located om my 6.0 engine
The check engine light is on, the truck would not change out of 1st gear. The truck was transported to GMC garage. Th...
Didn't find what you were looking for?