ist time poster. i've got a 2oo5 duramax that is stock except for 285 tires. i am thinking about sending my pcm off to westers to get a custom towing tune installed. can anyone desribe where the pcm is located, or better yet, take a picture of it to show its location. also, does anyone have any comments on the westers tuning. thanks

Mine should be back tomorrow and in this weekend--will post then.

The PCM is down below the driver side battery. There is a cover to remove and you have access to it. It's not as hard to get at as it looks.