TrailBlazer 2WD V8-6.0L (2009)
19 - Engine Coolant Temperature (ECT) Sensor
20 - Engine Control Module (ECM) X1
21 - Engine Control Module (ECM) X2
22 - Engine Control Module (ECM) X3
23 - Fuse Block - Underhood X1
24 - J100
25 - Brake Booster Vacuum Sensor (5.3L)
26 - Fuel Injector 1