Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
There is a factory service bulletin for the following GMC models:
2008-2009 GMC Envoy
2008-2011 GMC Canyon
2008-2011 GMC Savana
2008-2011 GMC Sierra
2008-2011 GMC Sierra Denali
2008-2011 GMC Yukon
2008-2011 GMC Yukon Denali
2008-2011 GMC Yukon XL
2008-2011 GMC Yukon XL Denali
2008-2011 GMC Yukon Two-Mode Hybrid
2009-2011 GMC Sierra Two-Mode Hybrid GMC Factory Service Bulletin OBDII Code P2135
Chevy / GMC Code P2135 TPS Problems
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2135 GMC code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
What are Code Possible Symptoms?
Engine Light ON (or Service Engine Soon Warning Light)
Code P2135 GMC Description
The Throttle Body Assembly contains a contact-less inductive throttle position sensing element that is managed by a customized integrated circuit. The throttle position sensor is mounted within the throttle body assembly and is not serviceable. The Engine Control Module (ECM) supplies the throttle body with a 5 V reference circuit, a low reference circuit. The asynchronous signal means communication is only going from the throttle body to the ECM. The throttle body cannot receive data from the ECM over the signal/serial data circuit. The throttle position sensor provides a signal voltage that changes relative to throttle blade angle. The throttle position sensor information is transmitted between the throttle body and the ECM on the signal/serial data circuit. The ECM decodes the serial data signal and is used as voltages for throttle position sensor 1 and 2. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that throttle position sensors 1 and 2 disagree greater than 7 - 10 percent for greater than 1 s.
P2135 GMC Code - Throttle Position Sensors 1-2 Not Plausible
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