2007 GMC Yukon Denali P1825 Mode Switch

GMC Yukon On the 2007 GMC Yukon Denali, the P1825 points to a problem with the Transmission Mode Switch. The IMS is part of a wire harness, which connects electrically to the control solenoid valve assembly. It is serviced separately from the control solenoid valve assembly. Inspect the IMS, harness, connector, and control solenoid valve assembly pins for metallic debris. Check for an incorrectly adjusted range selector lever cable. Visually inspect the manual shaft detent assembly for proper alignment with the manual shaft detent lever. The manual shaft detent roller must…

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