Disposal Drain the differential lubricant. See Lubrication. Break the link pump check valve electric connector. Remove the link pump check valve mounting bolts. See fig. 1. Remove the link pump check valve by carefully pulling directly from the differential carrier. Remove the "O" ring seals from the valve. The "O" ring seals can be reused as not cut or damaged. If reinstalling the original valve, inspect for damaged, loose or missing pick up damaged screen, "O" rings, is missing or damaged electrical connector, or oil passages limited by mud or debris. Installation Note:

During cranking, check the ignition Control Module (ICM) the 7 X crankshaft position sensor signal. Once the ICM spark synchronization determines, 3 X reference signals sent to the PCM. The PCM will command all six injectors ON priming for a shot of fuel in all cylinders. After the priming are the injectors OFF for the next six fuel control reference signals (two crankshaft revolutions). As each cylinder a chance to use of the fuel of the priming shot. During this waiting period, will be a cam pulse are received by the PCM. The PCM uses the Cam signal pulses

Condition that some customers intermittent lighting of the Service 4WD light commenting. On research, the technician can find DTC C0374 collection. The customer can also comment about intermittent erratic operation of the 4WD or AWD system after driving through the rain/snow or just going through a car wash. Cause the speed sensor signal have become damaged. Possible openings in the speed sensor wire insulation (twisted pairs) can water ingress. Also, wire connections contaminated by water may result in the short circuits and erroneous speed sensor

Condition that some customers water leaks on the front passenger can carpet commenting. Cause Water can be getting past the rubber water deflector located under the air inlet grille flap. During the diagnosis, the technician can note that the air filter passenger ships compartment wet. Install the new correction plenum water deflector. Follow the procedure below: 1. place the wipers in up position.

Electrical Motor > firing Orders firing Orders to avoid confusion, always replace spark plugs and wires one at a time. Replace spark plugs and wires one at a time will help prevent incorrect wire routing or cross-firing due to an incorrect firing order. If more than one thread is one at a time, you must be disconnected all cables to ensure correct installation label. Also, disconnect the cables, compare the order firing and routing to these diagrams and note any differences for installation purposes. This will help ensure that the wires are installed correctly.

TOPIC: models: heated windshield Washer Module Short Circuit – add Wire Harness 2006-2008 model year Buick Lucerne; Cadillac DTS; HUMMER H2 vehicles; 2007-2008 model year Cadillac Escalade, Escalade ESV, Escalade EXT; Chevrolet Avalanche, Silverado, Suburban, Tahoe; GMC Acadia, Sierra, Yukon, Yukon XL; Saturn OUTLOOK vehicles; 2008 model year Buick Enclave and vehicles equipped with a liquid heated Washer system. A short circuit on the circuit board for the washer fluid heater can overheat the wire ground control-circuit. This can cause other electrical interference,

Circuit description The PCM system check tension on the PCM inflammation feed circuit. If the voltage system of tolerance, it will be P0560 DTC. When the conditions set DTC P0560 are present, the operation of some vehicle systems and components are affected. Conditions for setting the DTC • the engine is running. • System voltage controlled on the PCM inflammation feed circuit is less than 9 volts or greater than 16 volts. • Above conditions for longer than 25 seconds. Action taken when the DTC Sets • The PCM will not illuminate the malfunction

Description of the circuit the control module can the right fuel injector on the intake rate for each cylinder. 1 a ignition voltage is delivered directly to the fuel injectors. The control module manages every fuel injector control circuit by grounding via a solid state device called a driver. Diagnostic Aids • control of the fuel injector circuit status with a scan tool, while moving the fuel injector harness, can contribute to an intermittent condition isolate. • The fuel Injector Coil Test run can help isolate a intermittent condition. Refer to fuel Injector solenoid Coil Test. •

Some customers comment on a low level indicator oil lamp and/or engine oil leak can give for value. Upon closer examination, the technician can find that the oil leak of oil pressure sensor that is threaded in the valve lifter oil manifold (VLOM) meeting and/or hood Valley. Correction if the engine oil leak turned out to be on the engine oil pressure sensor, then remove the oil pressure sensor and reseal with a pipe sealant with Teflon or equivalent, P/N 12346004 (in Canada, P/N-10953480). Refer to engine oil pressure sensor and/or Switch replacement in SI.

Some customers can comment on a motor light to be lit check box. This condition is intermittent and research, the technician can find DTC P0128 set. Correction to verify that the cooling system is filled to the appropriate level and with a scan-tool, make sure that the thermostat is open at the right temperature. If everything works, then you must reprogram the PCM with a new calibration using the Service