Possible causes

– Faulty Park/neutral position switch
– Misadjusted park/neutral position switch
– Park/neutral position switch harness is open or shorted
– Park/neutral position switch circuit poor electrical connection

When is the code detected?

The transmission range switch detects the selector lever position and sends a signal to the TCM.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P0706 GMC Description

The park/neutral position (PNP) switch includes a transmission range switch. The transmission range switch detects the selector lever position when the shift lever is in the N or P shift position and sends a signal to the Transmission Control Module (TCM).

GMC Technical Service Bulletins for P0706 code