No. It is on the oil pan and can be accessed by removing the plastic skid plate cover.
www.trailvoy.com
has all the answers about your Trailblazer or Envoy
4200 Vortec Inline 6 cylinder engine #1 cylinder is at the front of the engine as you stand out front and look at it. Remove the resonator box on top of the motor to expose the coil packs. The spark plugs are under them.
There isn't a drain plug. You will need to remove the diff cover to drain the gear lube.
135 from front to back located on the drivers side or right.246 front to back located passenger or left.
Drivers side on front of engine compartment
Drivers side front
Number one is the front cylinder on the driver side.
follow the radiator hose to the engine, right where the hose meets the block is where the thermostat is located. Its on the the front of the engine
front left of engine facing radiator.
The coolant temperature sensor, on a 2005 Chevrolet trailblazer 4.2 liter engine, is located just above the thermostat housing. The thermostat housing is located in the front of the engine.
Depends on the year, make and model vehicle and engine coolant drain, engine oil drain, automatic transmission oil drain, standard transmission oil drain, front differential oil drain and rear differential oil drain.
There numbered front to back... Engine front is closest to the radiator the first cylinder is #1 the rear cylinder is #6 The engine firing order is 1,5,3,6,2,4
To get to the drain plug you have to remove the front two plastic splash shields to get to the drain plug.