I have an '05 Trailblazer that threw codes P2101 and P1516 this afternoon. Under possible causes, it lists "faulty throttle actuator control module" as a possible issue. My question is, WHERE IS IT LOCATED??? I have googled images for a few hours now and I keep seeing that it's either a box that...

2002 Trailblazer LTZ I-6 4WD 143k miles. When starting after it has been sitting for a while (like overnight) the Service Engine Soon and Reduced Engine Power lights come on. While idling with the REP light on the RPM will vary back and forth from 600 rpm (idles very roughly at this point...

I have a 2006 Trailblazer LS 6 Cylinder. I am getting a P1516 code after replacing the ignition switch. Many variables with this code. Try and clean throttle body? Battery might be a bit low but starts fine. Slightly rough idle. Checked all connections and nothing loose or obvious. Any ideas?