2011 Sierra SLT 5.3 rolls backwards in park

[lakeguy77]

I've had my Sierra for a year and a half, and just today when I got home, pulled into the driveway and put it in park, and as soon as I let off the brake, it started rolling back down my driveway slowly. Put my foot on the brake, shifted into R, then back into P, same thing. Had to engage the e-brake to get it to stay. Anybody with any info on this issue?

[Bad Bowtie2]

That's a bad situation. I've heard of a bad parking pawl on the older GM trucks, like 1990 models. Not anything this new!!

 

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