SOURCE: check engine an ets light is on
Most probably it should be in the fuse box under the bonnet. These box have markings on its cover to tell which fuse is of what. If you have located the sensor then unplug it and check across two white wires (if its 4 wire sensor) using a multimeter that you are getting 12v with ignition ON or not. I am saying this because most of the time for such an old vehicle it could be faulty sensor itself and not the fuse.
SOURCE: where are the camshaft and crankshaft position sensors on 2001 silverado 8.1 V8
Crank shaft sensor
Remove the driver side rear ignition coil bolts. Reposition the coil. Disconnect the crankshaft position (CKP) sensor electrical connector. # Use penetrating oil and allow the oil to soak around the CKP sensor prior to removing the sensor. You're looking at left, rear side of engine.
CAMSHAFT POS.
front side of engine on the drives side about half way up the timing cover, not hard to get to.
P0050 HO2S Heated Oxygen Sensor -Control Circuit (Bank 2 Sensor 1)
P0051 HO2S Heated Oxygen Sensor -Control Circuit Low (Bank 2 Sensor 1)
P0052 HO2S Heated Oxygen Sensor -Control Circuit High (Bank 2 Sensor 1)
P0053 HO2S Heated Oxygen Sensor -Resistance (Bank 1 Sensor 1)
P0054 HO2S Heated Oxygen Sensor -Resistance (Bank 1 Sensor 2)
P0055 HO2S Heated Oxygen Sensor -Resistance (Bank 1 Sensor 3)
P0056 HO2S Heated Oxygen Sensor -Control Circuit (Bank 2 Sensor 2)
P0057 HO2S Heated Oxygen Sensor -Control Circuit Low (Bank 2 Sensor 2)
P0058 HO2S Heated Oxygen Sensor -Control Circuit High (Bank 2 Sensor 2)
P0059 HO2S Heated Oxygen Sensor -Resistance (Bank 2 Sensor 1)
P0060 HO2S Heated Oxygen Sensor -Resistance (Bank 2 Sensor 2)
P0061 HO2S Heated Oxygen Sensor -Resistance (Bank 2 Sensor 3)
P0062 HO2S Heated Oxygen Sensor -Control Circuit (Bank 2 Sensor 3)
P0063 HO2S Heated Oxygen Sensor -Control Circuit Low (Bank 2 Sensor 3)
P0064 HO2S Heated Oxygen Sensor -Control Circuit High (Bank 2 Sensor 3)
P0065 Air Assisted Injector -Range/Performance
P0066 Air Assisted Injector -Circuit Malfunction or Circuit Low
P0067 Air Assisted Injector -Circuit High
P0068 (MAP) Manifold Absolute Pressure /(MAF) Mass Air Flow - Throttle Position
Correlation
P0069 (MAP) Manifold Absolute Pressure / (BARO)Barometric Pressure Correlation
P0070 Ambient/Outside Air Temperature Sensor -Circuit Malfunction
P0071 Ambient/Outside Air Temperature Sensor -Range/Performance Problem
P0072 Ambient/Outside Air Temperature Sensor -Circuit Low Input
P0073 Ambient/Outside Air Temperature Sensor -Circuit High Input
P0074 Ambient/Outside Air Temperature Sensor -Circuit Intermittent
P0075 Intake Valve Control Solenoid Circuit Malfunction (Bank 1)
P0076 Intake Valve Control Solenoid Circuit Low (Bank 1)
P0077 Intake Valve Control Solenoid Circuit High (Bank 1)
P0078 Exhaust Valve Control Solenoid Circuit Malfunction (Bank 1)
P0079 Exhaust Valve Control Solenoid Circuit Low (Bank 1)
P0080 Exhaust Valve Control Solenoid Circuit High (Bank 1)
P0081 Intake valve Control Solenoid Circuit Malfunction (Bank 2)
P0082 Intake Valve Control Solenoid Circuit Low (Bank 2)
P0083 Intake Valve Control Solenoid Circuit High (Bank 2)
P0084 Exhaust Valve Control Solenoid Circuit Malfunction (Bank 2)
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