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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1047 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - DTC P0218 To DTC P2771) >> DTC P1810, P1815, P1816, or P1818 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2008 GMC Sierra and 2008 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Start and idle the engine. Using the scan tool, observe the TFP Sig. B/Sig. C parameter. The scan tool should display HI/HI. Move the gear selector through all ranges and ensure that the TFP Switch parameter matches the gear selector for each selected range.

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