Throttle problem

[dayj1]

Originally Posted by upon1

Had the guy that built the harness look at it and he thinks it’s a mismatched tac and pedal. Motor is a 2001 and the the pedal itself is all plastic so he thinks it’s out of a newer unit.

I'm with ls1nova71 (and your harness builder) in that you have mismatched parts. As long as you end up with a matched set of PCM/harness/TB/TAC/pedal you can get a working setup.

I'm speaking under the assumption that you would like to keep your PCM/harness as you've already spent time/money on those and a different (blue/green) PCM won't just "plug in". With that in mind, if you have an all plastic pedal, it's at least a 2006 model pedal and NOT compatible with the early DBW. If your TB only has a single 8 pin connection, then it's 2003 to early '07 and also not compatible with the early DBW. The correct TB for your ECM has two connectors (one for TPS and one for the throttle blade motor). If your TAC has the aluminum bracket (as opposed to all plastic), it is also not compatible with the early DBW setup.

Here's a link with some pics of the different components.

http://chevythunder.com/drive_by_wire.htm