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Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 16769
Experience:  15 years GM master tech
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P1516 code on 03 escalade

Customer Question

p1516 code on 03 escalade
Submitted: 1 year ago.
Category: Chevy
Expert:  Gary replied 1 year ago.

I am sorry for the long wait

if you clear the code hos soon before it resets ?

has anything been done yet or anything replaced yet to correct this issue ?

Customer: replied 1 year ago.
it all varies on how long it takes or how often it does it no rhyme or reason might not do it for 3 days then do it 10 times in a 20 mile trip,, cleaned throttle body, took grounds off and cleaned and put back on,checked all the wires going to throttle body... did find a broken ground strap last night going from hood to stud on fire wall not sure that would do anything or not
Expert:  Gary replied 1 year ago.

if you unplug the throttle body connector and the TAC module connector and pack both connectors with dielectric grease then plug them back in will it still do this ?

Customer: replied 1 year ago.
are you talking about the the plug at the tac
Customer: replied 1 year ago.
the step motor on side of throttle body?
Expert:  Gary replied 1 year ago.

both connectors

the one at the throttle body and the one at the TAC

if it still resets this code replace the throttle body connector and shrink wrap in the new wires one at a time to the stock wiring so you do not mix them up

if it still sets this code the throttle body needs to be changed

this code is specific to the TAC module not getting correct signals from the throttle body

Customer: replied 1 year ago.
I only checked one connector out front that went to that tac where is the other one
Expert:  Gary replied 1 year ago.

one connector is the connector that connects to the throttle body itself and the other is the one at the TAC module in the picture i sent you

Expert:  Gary replied 1 year ago.

how are you making out ?