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error code p1516 GMC sierra

22045 Views 3 Replies 2 Participants Last post by  el semental
If anyone is available to answer this I would appreciate it.
I am getting the error code P1516 on my full size 2003 GMC Sierra
any answers for me???????
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I read a thread about the p0327 error code and it applies to my truck but i don't know if these are related cause i'm getting them both?????????????
I am also getting a message on my gauge cluster that says "service airbag"
this is from another forum, it was 2003 sierra aswell. hope it helps.

after reading both problems just thought i would pass along this info.found this might want to check this also.A vehicle may be brought into the dealer for a reduced power message, and DTCs P0120, P0220, P1516, P2101, or P2135.
The Throttle Actuator Control (TAC) / throttle body type trouble codes, may be caused by a loose wiring crimp at the throttle body connector, or a broken throttle body circuit.
<A href="">Recommendation/Instructions:

Complete the current SI diagnostics for any symptoms or trouble codes found. If a intermittent T/P or TAC module type code is occurring complete the inspections below.
<LI type=1>Inspect all related throttle body terminals for a loose wiring crimp. The loose crimp may be difficult to find, and the poor connection will be between the terminal and the copper strands of the wire. Wiggle test the individual throttle body circuits to see if the concern can be duplicated. <LI type=1>Inspect the related circuits for broken wires inside the insulation. The outer wire insulation may look fine, but the internal copper strands may be partially broken. Breaks in the wires usually occur within 1 to 4 inches of the throttle body connector. Wiggle testing may also induce a trouble code to set.
On C/K trucks complete SI procedures for voltage drop on grounds G103 and G104. Grounds G103 or G104 may be loose or corroded. just thought of a little fyi.
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