I have a Trailblazer, and have fumbled through both Chilton and Haynes in the past for this and other cars, sometimes great sometimes not. I have gotten better information and ideas or maintenance and replacement of things from Trailvoy.com for a trailblazer. The best example I can give is changing trans fluid. Dropping the pan and filter is good, but it only replaces 6 of 12 qts. If you want a total change crack the trans open! Knowing my filter was good, as it had been changed within mile recommendation. Disconnect trans hose from radiator, hose to flow to a bucket, start engine and pour in trans fluid until what is flowing into the bucket is purty red. You won’t find that in Chilton or haynes, and I feel good about having a greater percent of old trans fluid out. Other help on thermostat, 2 or 3 experiences and options etc. See if there is a repair site specific for your breed or engine is my best experience. Web repair sites are good also. Thank goodness for all the altruistic helpers on the interweb!