I recently purchased a 2002 LTZ Trailblazer. I love the car. When i purchased the car it had like a ticking sound when u would start her up but only for like 3 minutes then it would go away. The original owner said that it was from the fan clutch and it was nothing to worry about. H e had even purchased a used clutch but never got around to installing it. two days later as i was driving a yellow engine light came on. i got worried. i kept driving. Then another one came on but with an arrow pointing down in the middle of the engine. I went to a local mechanic and he cleared the alerts. 20 minutes later they came on again. but first the engine light comes on then later on the second one with arrow in the middle comes on. Is this from the fan clutch?? What do these alerts mean?? Im really worried that smthg is going to fail or the car is going to die out on me. All the other guages are stable and i didnt notice any difference in performance. Please anyone help me.