GM tells that even if one of these pins is replaced, the driver may be able to shift out of "park'' without even depressing the brake pedal. Furthermore, shifting is also possible without pressing the shift lever detent lock button. But wait, the comedy doesn't end here.
The American manufacturer notes that the driver may also experience difficulty removing the key from the ignition cylinder when the transmission is in "park". In addition to this niggle, pin displacement can also lead to the vehicle's "PRNDL" screen to display inaccurate transmission position information.
What we previously detailed about the gearbox shift interlock problem boils down to a non-compliant piece of kit that fails to conform to Federal Motor Vehicle Standard No. 114. General Motors announced it will notify affected owners, with dealers instructed to replace the shift lever roll pin, base pivot pin and fit a better brake transmission shift interlock retention clip to 2011 - 2013 Chevrolet Caprice PPVs.