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Tahoe / Yukon Service Manual

Camshaft Position Sensor Wire Replacement

Engine Controls and Fuel - 5.3L L84 or 6.2L L87 | Repair Instructions | Document ID: 5590111 Single Use Fastener / Component Accessory Drive Auxiliary Belt Accessory Drive Primary Belt Engine Oil Cooler Retainer [2x] Water Pump Gasket [2x] Special Tools EN-51767-2 Universal Stretchy Belt Installer Equivalent regional tools: Special Tools Removal Procedure

  1. Drain the cooling system. Cooling System Draining and Filling
  2. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
Camshaft Position Sensor Wire Replacement — figure 1
Camshaft Position Sensor Wire Replacement — figure 1
  1. Air Cleaner Outlet Duct Bracket Bolt (1) » Remove
  2. Remove the engine wiring harness from the air cleaner outlet duct bracket.
Camshaft Position Sensor Wire Replacement — figure 2
Camshaft Position Sensor Wire Replacement — figure 2
  1. Positive Crankcase Ventilation Fresh Air Tube (1) » Disconnect — Plastic Collar Quick Connect Fitting Service
  2. Air Cleaner Outlet Duct Clamp (2) » Loosen [2x]
  3. Air Cleaner Outlet Duct (3) » Remove
Camshaft Position Sensor Wire Replacement — figure 3
Camshaft Position Sensor Wire Replacement — figure 3
  1. Radiator Surge Tank Outlet Hose Clip (2) » Remove [2x]
  2. Radiator Surge Tank Outlet Hose (3) » Position aside
Camshaft Position Sensor Wire Replacement — figure 4
Camshaft Position Sensor Wire Replacement — figure 4
  1. Radiator Inlet Hose Clip (2) » Remove
  2. Radiator Inlet Hose Clamp (1) » Disengage — Hose Clamp Replacement Guidelines - Spring Type
  3. Radiator Inlet Hose (3) @ Engine Radiator » Remove and position aside
Camshaft Position Sensor Wire Replacement — figure 5
Camshaft Position Sensor Wire Replacement — figure 5
  1. Wiring Harness Retainer (1) » Remove [2x]
  2. Electrical Connector (3) » Disconnect
  3. Wiring Harness (2) » Position aside
Camshaft Position Sensor Wire Replacement — figure 6
Camshaft Position Sensor Wire Replacement — figure 6
  1. Wiring Harness Retainer (2) » Remove [2x]
  2. Electrical Connector (1) » Disconnect
  3. Wiring Harness (3) » Position aside
Camshaft Position Sensor Wire Replacement — figure 7
Camshaft Position Sensor Wire Replacement — figure 7
  1. Engine Oil Cooler Hose Clip (1) » Release
Camshaft Position Sensor Wire Replacement — figure 8
Camshaft Position Sensor Wire Replacement — figure 8
  1. Engine Oil Cooler Retainer (2) » Remove and DISCARD [2x]
  2. Engine Oil Cooler Pipe Bracket Bolt (3) » Remove
  3. Engine Oil Cooler Hose (1) @ Engine Radiator » Remove [2x]
  4. Cap the ends of the engine oil cooler hose to prevent contamination.
Camshaft Position Sensor Wire Replacement — figure 9
Camshaft Position Sensor Wire Replacement — figure 9
  1. Transmission Fluid Cooler Pipe Bolt (1) » Remove
  2. Transmission Fluid Cooler Pipe Clip (2) » Remove [2x]
Camshaft Position Sensor Wire Replacement — figure 10
Camshaft Position Sensor Wire Replacement — figure 10
  1. Transmission Fluid Cooler Pipe Clip (1) » Release
Camshaft Position Sensor Wire Replacement — figure 11
Camshaft Position Sensor Wire Replacement — figure 11
  1. Engine Coolant Fan Bracket Bolt (1) » Remove [2x]
Camshaft Position Sensor Wire Replacement — figure 12
Camshaft Position Sensor Wire Replacement — figure 12
  1. Engine Cooler Fan (1) @ Engine Radiator » Remove
Camshaft Position Sensor Wire Replacement — figure 13
Camshaft Position Sensor Wire Replacement — figure 13
  1. Using a suitable tool, cut the accessory drive primary belt (1).
  2. Accessory Drive Primary Belt (1) » Remove and DISCARD
Camshaft Position Sensor Wire Replacement — figure 14
Camshaft Position Sensor Wire Replacement — figure 14
  1. Using a suitable tool, cut the accessory drive auxiliary belt (1).
  2. Accessory Drive Auxiliary Belt (1) » Remove and DISCARD
Camshaft Position Sensor Wire Replacement — figure 15
Camshaft Position Sensor Wire Replacement — figure 15
  1. Battery Positive Cable Nut (1) » Remove
  2. Starter Solenoid Cable (2) » Remove
  3. Electrical Connector (3) » Disconnect
Camshaft Position Sensor Wire Replacement — figure 16
Camshaft Position Sensor Wire Replacement — figure 16
  1. Generator Bolt (1) » Remove
  2. Generator Bolt (2) » Remove
Camshaft Position Sensor Wire Replacement — figure 17
Camshaft Position Sensor Wire Replacement — figure 17
  1. Generator (1) » Remove
Camshaft Position Sensor Wire Replacement — figure 18
Camshaft Position Sensor Wire Replacement — figure 18
  1. Hose Clamp (1) » Disengage [2x] — Hose Clamp Replacement Guidelines - Spring Type
  2. Heater Inlet Hose (2) @ Water Pump » Remove
  3. Heater Water Auxiliary Pump Hose (3) @ Water Pump » Remove
Camshaft Position Sensor Wire Replacement — figure 19
Camshaft Position Sensor Wire Replacement — figure 19
  1. Hose Clamp (1) » Disengage — Hose Clamp Replacement Guidelines - Spring Type
  2. Radiator Outlet Hose (2) @ Water Pump » Remove
Camshaft Position Sensor Wire Replacement — figure 20
Camshaft Position Sensor Wire Replacement — figure 20
  1. Hose Clamp (1) » Disengage [2x] — Hose Clamp Replacement Guidelines - Spring Type
  2. Engine Coolant Air Bleed Hose (2) @ Water Pump » Remove
  3. Radiator Inlet Hose (3) @ Water Pump » Remove
Camshaft Position Sensor Wire Replacement — figure 21
Camshaft Position Sensor Wire Replacement — figure 21
  1. Engine Coolant Temperature Sensor Electrical Connector (1) » Disconnect
Camshaft Position Sensor Wire Replacement — figure 22
Camshaft Position Sensor Wire Replacement — figure 22
  1. Air Conditioning Compressor Bolt (1) » Remove
  2. Air Conditioning Compressor Nut (2) » Remove
  3. Air Conditioning Compressor Stud (3) » Remove
Camshaft Position Sensor Wire Replacement — figure 23
Camshaft Position Sensor Wire Replacement — figure 23
  1. Air Conditioning Compressor (1) » Remove and position aside
Camshaft Position Sensor Wire Replacement — figure 24
Camshaft Position Sensor Wire Replacement — figure 24
  1. Water Pump Bolt (1) » Remove [6x]
Camshaft Position Sensor Wire Replacement — figure 25
Camshaft Position Sensor Wire Replacement — figure 25
  1. Water Pump (1) » Remove
  2. Water Pump Gasket (2) » Remove and DISCARD [2x]
Camshaft Position Sensor Wire Replacement — figure 26
Camshaft Position Sensor Wire Replacement — figure 26
  1. Disconnect the 4 camshaft position actuator magnet electrical connectors.
  2. Camshaft Position Sensor Bracket Bolt (1) » Remove [2x]
  3. Camshaft Position Sensor Wire (2) » Remove Cleaning and Inspection Procedure - Required
Camshaft Position Sensor Wire Replacement — figure 27
Camshaft Position Sensor Wire Replacement — figure 27
  1. Inspect the camshaft position (CMP) actuator magnet for the following conditions: 1.1. A damaged electrical connector 1.2. An accumulation of dirt or debris in the recessed area around the pintle. 1.3. A build-up of burnt engine oil on the shaft of the pintle which may cause the pintle to stick and not move freely within the proper range of travel.
  2. Holding the CMP magnet with the pintle facing upward, measure the pintle retracted position (a). Record the dimension.
Camshaft Position Sensor Wire Replacement — figure 28
Camshaft Position Sensor Wire Replacement — figure 28
  1. Holding the CMP magnet with the pintle facing downward, measure the pintle extended position (b). Record the dimension.
  2. Subtract the retracted dimension (a) from the extended dimension (b) to determine pintle travel. A properly moving pintle will travel 3.0–5.5 mm (0.12–0.22 in).
  3. If the pintle of the CMP magnet is binding or does not move within the proper range of travel, replace the CMP magnet as an assembly.
Camshaft Position Sensor Wire Replacement — figure 29
Camshaft Position Sensor Wire Replacement — figure 29

  1. Clean all excess dirt and debris from the water pump (1).

  2. Inspect the water pump (1) for the following conditions: 7.1. Water pump gasket and hose sealing surfaces for excessive scratches or gouging 7.2. Restrictions within the internal coolant passages 7.3. Excessive side-to-side play in the pulley shaft 7.4. Leakage at the water inlet housing or rear cover 7.5. Leakage at the water outlet housing or water pump outlet 7.6. Leakage at the water pump vent hole A stain around the vent hole is acceptable. If leakage or dripping occurs with the engine running and the cooling system pressurized, replace the water pump (1). 7.7. Wear or damage in the belt tracking area of the water pump pulley Installation Procedure

  3. Camshaft Position Sensor Wire (2) » Install

  1. Camshaft Position Sensor Bracket Bolt (1) » Install and tighten [2x] — Fastener Specifications

  2. Connect the 4 camshaft position actuator magnet electrical connectors.

  3. Water Pump Gasket (2) » Install NEW [2x]

  4. Water Pump (1) » Install

  5. If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps: 6.1. Remove any loose cured adhesive from the external threads of the component using a lint free cloth. 6.2. Thread the cleaned component into the internal mating threads and remove to loosen trapped cured adhesive. 6.3. Apply thread locking adhesive to the external threads of the component. Adhesives, Fluids, Lubricants, and Sealers 6.4. Ensure there are no gaps in the thread locking adhesive once applied to the component.

  6. Water Pump Housing Bolt (1) » Install and hand tighten [6x]

  7. Water Pump Housing Bolt (1) » Tighten in sequence [6x] — Fastener Specifications

  8. Air Conditioning Compressor (1) » Install

  9. Air Conditioning Compressor Stud (3) » Install and tighten — Fastener Specifications

  10. Air Conditioning Compressor Nut (2) » Install and tighten — Fastener Specifications

  11. Air Conditioning Compressor Bolt (1) » Install and tighten — Fastener Specifications

  12. Engine Coolant Temperature Sensor Electrical Connector (1) » Connect

  13. Radiator Inlet Hose (3) @ Water Pump » Install

  14. Engine Coolant Air Bleed Hose (2) @ Water Pump » Install

  15. Hose Clamp (1) » Engage [2x] — Hose Clamp Replacement Guidelines - Spring Type

  16. Radiator Outlet Hose (2) @ Water Pump » Install

  17. Radiator Outlet Hose Clamp (1) » Engage — Hose Clamp Replacement Guidelines - Spring Type

  18. Heater Water Auxiliary Pump Hose (3) @ Water Pump » Install

  19. Heater Inlet Hose (2) @ Water Pump » Install

  20. Hose Clamp (1) » Engage [2x] — Hose Clamp Replacement Guidelines - Spring Type

  21. Generator (1) » Install

  22. Generator Bolt (1) » Install and tighten — Fastener Specifications

  23. Generator Bolt (2) » Install and tighten — Fastener Specifications

  24. Starter Solenoid Cable (2) » Install

  25. Battery Positive Cable Nut (1) » Install and tighten — Fastener Specifications

  26. Electrical Connector (3) » Connect

  1. Install the accessory drive auxiliary belt following the instructions included with the belt.
Camshaft Position Sensor Wire Replacement — figure 30
Camshaft Position Sensor Wire Replacement — figure 30
  1. Inspect the accessory drive auxiliary belt (1) for proper installation and alignment.
Camshaft Position Sensor Wire Replacement — figure 31
Camshaft Position Sensor Wire Replacement — figure 31
  1. Rotate the balancer (1) an additional 360 degrees to ensure proper accessory drive auxiliary belt installation.
Camshaft Position Sensor Wire Replacement — figure 32
Camshaft Position Sensor Wire Replacement — figure 32
  1. Position the accessory drive primary belt (4) on the belt idler pulley (2), fan and water pump pulley (3) and generator (1).
Camshaft Position Sensor Wire Replacement — figure 33
Camshaft Position Sensor Wire Replacement — figure 33
  1. Install the EN-51767-2 Universal Stretchy Belt Installer (1) onto the crankshaft balancer.
Camshaft Position Sensor Wire Replacement — figure 34
Camshaft Position Sensor Wire Replacement — figure 34
  1. Position the accessory drive primary belt (2) on the crankshaft balancer.
  2. Slowly rotate the crankshaft balancer in a clockwise direction until the accessory drive primary belt (2) fully seats on the crankshaft balancer.
  3. Remove the EN-51767-2 Universal Stretchy Belt Installer (1) from the crankshaft balancer.
Camshaft Position Sensor Wire Replacement — figure 35
Camshaft Position Sensor Wire Replacement — figure 35
  1. Inspect the accessory drive primary belt (1) for proper installation and alignment.
Camshaft Position Sensor Wire Replacement — figure 36
Camshaft Position Sensor Wire Replacement — figure 36

  1. Rotate the crankshaft balancer (1) and additional 360 degrees to ensure proper accessory drive primary belt installation.

  2. Engine Cooler Fan (1) @ Engine Radiator » Install

  3. Engine Coolant Fan Bracket Bolt (1) » Install and tighten [2x] — Fastener Specifications

  4. Transmission Fluid Cooler Pipe Clip (1) » Secure

  5. Transmission Fluid Cooler Pipe Clip (2) » Install [2x]

  6. Transmission Fluid Cooler Pipe Bolt (1) » Install and tighten — Fastener Specifications

  7. Remove the caps on the ends of the engine oil cooler hose to prevent contamination.

  8. Engine Oil Cooler Hose (1) @ Engine Radiator » Install [2x]

  9. Engine Oil Cooler Pipe Bracket Bolt (3) » Install and tighten — Fastener Specifications

  10. Engine Oil Cooler Retainer (2) » Install NEW [2x]

  11. Engine Oil Cooler Hose Clip (1) » Secure

  1. Position the wiring harness. (3)
  2. Electrical Connector (1) » Connect
  3. Wiring Harness Retainer (2) » Install [2x]
  1. Position the wiring harness. (2)
  2. Electrical Connector (3) » Connect
  3. Wiring Harness Retainer (1) » Install [2x]

  1. Radiator Inlet Hose (3) @ Engine Radiator » Install

  2. Radiator Inlet Hose Clamp (1) » Engage — Hose Clamp Replacement Guidelines - Spring Type

  3. Radiator Inlet Hose Clip (2) » Install

  4. Radiator Surge Tank Outlet Hose (3) » Move into position

  5. Radiator Surge Tank Outlet Hose Clip (2) » Install [2x]

  6. Air Cleaner Outlet Duct (3) » Install

  7. Air Cleaner Outlet Duct Clamp (2) » Tighten [2x] — Fastener Specifications

  8. Positive Crankcase Ventilation Fresh Air Tube (1) » Connect — Plastic Collar Quick Connect Fitting Service

  9. Air Cleaner Outlet Duct Bracket Bolt (1) » Install and tighten — Fastener Specifications

  10. Install the engine wiring harness to the air cleaner outlet duct bracket.

  11. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection

  12. Fill the cooling system. Cooling System Draining and Filling

  13. Start the engine and check for coolant leaks.