Not for free. Alldata has them for $25/year, I haven't tried them yet but some others say the quality of their scans isn't great.
Greetings,
>
> I was wondering if anyone knows where they put the temp sensor in the
> 2003 Trailblazers? I think it should be under the front bumper,
> however, I can see no cable or sensor block.
> on another note,
> Is there any place that has on-line wire diagrams?
>
> Thanks in advance,
>
> Markus