If this is a 4 wheel drive the clicking comes from a bad axle cv joint
Ensure that the wheel speed sensor/ABS sensor has been re installed properly at the wheels. Re-bleed brakes starting from the rear and then finish with the drivers side front.
its located next to the drivers side front tire, by the brakes
Disconnect the battery for 15-30 Mins and it will reset automatically.
Check the brake fluid level in the reservoir there is a sensor there that will make the light come on if your level is low.
I don't think Chevy changed the location of the knock sensor. On my 1994 4.3 its on the left hand (drivers side). There are 2 sensors there, one of them is the temp gauge sending unit and the other is the knock sensor.
Having mine changed today. Understand its beneath the power steering fluid well on drivers side of engine.
The sensor for the rear wheels are located on the brake shoe backing plate if you have drum brakes on the rear. The front brake sensor is located next to the caliper. The same if you have rear disc brakes.
On a Ford Expedition : Bank 1 , Sensor 2 ( downstream ) is the sensor for the passenger side of the engine Bank 2 , Sensor 2 ( downstream ) is the sensor for the drivers side of the engine So in short the answer is from the ( drivers seat )
Bank 1 is the drivers side head. The sensor you want will be screewed into the drivers side exhaust pipe and will be the 2ed one back towards the muffler in the drivers side exhaust pipe.
The speed sensor is located on the drivers side of the transfercase, you will see a sensor with a connector, that is your sensor.
if v6 its passenger side after the cat v8 drivers side after the cat
crank sensor or cam sensor