Injection and engine management system Chevrolet Tahoe 2 and 3
Description of the injection system and its elements
The engine control unit power unit (engine and transmission) has electronic control in order to reduce emissions of toxic substances with exhaust gases while...
The engine control unit power unit (engine and transmission) has electronic control in order to reduce emissions of toxic substances with exhaust gases while...
Engine Controls — Component Location
The OBD II symbol is used on circuit diagrams to inform the technician that this circuit is essential to the correct operation of the OBD II on-board...
The OBD II symbol is used on circuit diagrams to inform the technician that this circuit is essential to the correct operation of the OBD II on-board...
The engine control unit
Repair of the engine control unit (ECM) comes down to either replacing the block or reprogramming the EEPROM RAM. If the diagnostic results in a decision to...
Repair of the engine control unit (ECM) comes down to either replacing the block or reprogramming the EEPROM RAM. If the diagnostic results in a decision to...
Learning the crankshaft position measurement system
1. Connect the scanner. 2. Read the trouble codes stored in the memory of the control unit. If other fault codes are stored in addition to code P0315, carry...
1. Connect the scanner. 2. Read the trouble codes stored in the memory of the control unit. If other fault codes are stored in addition to code P0315, carry...
Throttle actuator learning
The engine control unit determines the position of the throttle valve at idle to ensure the specified idle speed. When flushing or replacing the throttle body,...
The engine control unit determines the position of the throttle valve at idle to ensure the specified idle speed. When flushing or replacing the throttle body,...
Throttle actuator control unit (early models)
Withdrawal 1. Disconnect the connector (2) instrument panels. 2. Release the red lock on the control box connector. 3. Disconnect the connector (1) control...
Withdrawal 1. Disconnect the connector (2) instrument panels. 2. Release the red lock on the control box connector. 3. Disconnect the connector (1) control...
Coolant temperature sensor
Withdrawal Note: Handle the sensor with care. Damage to the sensor adversely affects the operation of the fuel control system. 1. Drain the cooling system to a...
Withdrawal Note: Handle the sensor with care. Damage to the sensor adversely affects the operation of the fuel control system. 1. Drain the cooling system to a...
Air flow/air temperature sensor
Withdrawal Caution: Handle the sensor with care. Do not press or punch the sensor to avoid damage to the measuring cells located at the end of the sensor. Do...
Withdrawal Caution: Handle the sensor with care. Do not press or punch the sensor to avoid damage to the measuring cells located at the end of the sensor. Do...
Intake manifold absolute pressure sensor
Withdrawal 1. Remove the engine top cover. 2. Disconnect the connector (4) (later models) or (1) (early models) absolute air pressure sensor. Later models...
Withdrawal 1. Remove the engine top cover. 2. Disconnect the connector (4) (later models) or (1) (early models) absolute air pressure sensor. Later models...
Vacuum sensor in the brake booster
Withdrawal 1. Disconnect the connector (1) vacuum sensor. 2. Remove the vacuum sensor from the vacuum brake booster. 3. Remove the sensor O-ring. Installation...
Withdrawal 1. Disconnect the connector (1) vacuum sensor. 2. Remove the vacuum sensor from the vacuum brake booster. 3. Remove the sensor O-ring. Installation...
Oxygen sensor — removal and installation
Attention: A special non-stick compound is applied to the threads of the oxygen sensor to facilitate the removal procedure. New sensors are shipped pre-applied...
Attention: A special non-stick compound is applied to the threads of the oxygen sensor to facilitate the removal procedure. New sensors are shipped pre-applied...
Accelerator pedal position sensor
Withdrawal Caution: Handle Electronic Throttle Control Components (accelerator pedal) carefully. Do not drop the accelerator pedal. Do not immerse throttle...
Withdrawal Caution: Handle Electronic Throttle Control Components (accelerator pedal) carefully. Do not drop the accelerator pedal. Do not immerse throttle...
Throttle body
Withdrawal Caution: Handle electronic components of the throttle control system with care. Do not drop the throttle body. Do not immerse damper control...
Withdrawal Caution: Handle electronic components of the throttle control system with care. Do not drop the throttle body. Do not immerse damper control...
Relieve pressure in the fuel system
Caution: Before servicing the fuel system, remove the fuel filler cap and relieve pressure to reduce the risk of injury. Note: When disconnecting fuel line...
Caution: Before servicing the fuel system, remove the fuel filler cap and relieve pressure to reduce the risk of injury. Note: When disconnecting fuel line...
Maintenance of fuel line connectors
Note: A special tool is required to disconnect the fuel line connectors. Detachment Metal connectors 1. Relieve pressure in the fuel system. 2. Remove the...
Note: A special tool is required to disconnect the fuel line connectors. Detachment Metal connectors 1. Relieve pressure in the fuel system. 2. Remove the...
Draining the fuel tank
Tank front or single 1. Remove the fuel filler cap. 2. Raise the car and move the safety stands under the frame. 3. Loosen the clamp (1) front filler hose (the...
Tank front or single 1. Remove the fuel filler cap. 2. Raise the car and move the safety stands under the frame. 3. Loosen the clamp (1) front filler hose (the...
Fuel tank filler pipe
Withdrawal Caution: Before disconnecting the fuel lines, clean the connectors and surrounding areas to prevent dirt from entering the system. Series 1500 1....
Withdrawal Caution: Before disconnecting the fuel lines, clean the connectors and surrounding areas to prevent dirt from entering the system. Series 1500 1....
Fuel tank — removal and installation
Caution: Before disconnecting the fuel lines, clean the connectors and surrounding areas to prevent dirt from entering the system. Note: The configuration of...
Caution: Before disconnecting the fuel lines, clean the connectors and surrounding areas to prevent dirt from entering the system. Note: The configuration of...
Fuel tank pressure sensor
Series 1500 1. Remove the fuel tank. 2. If necessary, disconnect the EVAP tube from the fuel tank vent valve. 3. Gently pull out the sensor (1) from the tank....
Series 1500 1. Remove the fuel tank. 2. If necessary, disconnect the EVAP tube from the fuel tank vent valve. 3. Gently pull out the sensor (1) from the tank....
Fuel pump module
Withdrawal 1. Removal of the fuel pump module is described in the section " Fuel tank " chapters "fuel injection system". Installation 2. Installation is made...
Withdrawal 1. Removal of the fuel pump module is described in the section " Fuel tank " chapters "fuel injection system". Installation 2. Installation is made...
Fuel level sensor — removal and installation
Series 1500 1. Remove the fuel pump module (see section " Fuel tank " in chapter "fuel injection system"). 2. Use a small screwdriver to press the holder (1)...
Series 1500 1. Remove the fuel pump module (see section " Fuel tank " in chapter "fuel injection system"). 2. Use a small screwdriver to press the holder (1)...
Fuel pipes and hoses on the chassis
Caution: Before disconnecting tube/hose connectors, clean the area around the connector. Removal and installation 1. Relieve pressure in the fuel system. 2....
Caution: Before disconnecting tube/hose connectors, clean the area around the connector. Removal and installation 1. Relieve pressure in the fuel system. 2....
Fuel system cleaning
Caution: Use oil-free compressed air to purge the fuel lines. 1. Disconnect the negative battery cable. 2. Remove the fuel pump module. 3. Check the condition...
Caution: Use oil-free compressed air to purge the fuel lines. 1. Disconnect the negative battery cable. 2. Remove the fuel pump module. 3. Check the condition...
Fuel manifold, bypass pipe and injectors
Withdrawal Attention: identification numbers are marked on the parts of the fuel manifold. When replacing manifold parts, install parts with the same number....
Withdrawal Attention: identification numbers are marked on the parts of the fuel manifold. When replacing manifold parts, install parts with the same number....
Vapor accumulator cleaning valve
Withdrawal Early models 1. Remove the engine top cover. 2. Disconnect from the valve a tube of system of catching of steams of fuel. 3. Disconnect the...
Withdrawal Early models 1. Remove the engine top cover. 2. Disconnect from the valve a tube of system of catching of steams of fuel. 3. Disconnect the...
Cleaning the fuel injector
Cleaning of nozzles is recommended to be carried out in a specialized workshop using special equipment and using a special liquid. Warning: Do not use non-GM...
Cleaning of nozzles is recommended to be carried out in a specialized workshop using special equipment and using a special liquid. Warning: Do not use non-GM...
Evaporative accumulator purge solenoid valve
Withdrawal Early models 1. Raise the vehicle and slide the safety struts under the frame. 2. Disconnect the connector (1) purge valve. 3. Disconnect the quick...
Withdrawal Early models 1. Raise the vehicle and slide the safety struts under the frame. 2. Disconnect the connector (1) purge valve. 3. Disconnect the quick...
Evaporative Emissions Hoses and Tubes
On the fuel tank 1. Remove the fuel tank. 2. Next, refer to the fuel tank disassembly procedure in " Fuel tank ". On the engine 1. Remove the air filter outlet...
On the fuel tank 1. Remove the fuel tank. 2. Next, refer to the fuel tank disassembly procedure in " Fuel tank ". On the engine 1. Remove the air filter outlet...
Fuel vapor accumulator — removal and installation
Series 1500 Early Models 1. Raise the vehicle and slide the safety struts under the frame. 2. Disconnect all tubes and hoses from the vapor accumulator. 3....
Series 1500 Early Models 1. Raise the vehicle and slide the safety struts under the frame. 2. Disconnect all tubes and hoses from the vapor accumulator. 3....
Cleaning the Evaporative Emission System
Caution: Do not perform this procedure unless advised by the OBD. Cleaning of the system must be carried out at a service station using special equipment. 1....
Caution: Do not perform this procedure unless advised by the OBD. Cleaning of the system must be carried out at a service station using special equipment. 1....
Ignition coils — removal and installation
1. Remove the engine top cover. 2. Disconnect the wiring connector (1) ignition coils. 3. Remove the spark plug wire from the ignition coil. A) Rotate the...
1. Remove the engine top cover. 2. Disconnect the wiring connector (1) ignition coils. 3. Remove the spark plug wire from the ignition coil. A) Rotate the...
Spark plug wires
Examination The integrity of the spark plug wires is vital to the proper operation of the engine. In order to accurately recognize conditions that may affect...
Examination The integrity of the spark plug wires is vital to the proper operation of the engine. In order to accurately recognize conditions that may affect...
Spark plug
Examination Make sure the correct spark plugs are installed. Incorrect spark plug type causes deterioration in engine controllability. Make sure the spark plug...
Examination Make sure the correct spark plugs are installed. Incorrect spark plug type causes deterioration in engine controllability. Make sure the spark plug...
Crankshaft position sensor
Withdrawal Attention: whenever the crankshaft position sensor has been removed or replaced, a procedure must be carried out "learning" crankshaft position...
Withdrawal Attention: whenever the crankshaft position sensor has been removed or replaced, a procedure must be carried out "learning" crankshaft position...
Camshaft position sensor
Withdrawal Early models 1. Turn away a bolt of fastening of the gauge. Tightening torque 29 Nm. 2. Remove the sensor. 3. Installation is carried out in the...
Withdrawal Early models 1. Turn away a bolt of fastening of the gauge. Tightening torque 29 Nm. 2. Remove the sensor. 3. Installation is carried out in the...
Knock sensor — removal and installation
Early models 1. Remove the intake manifold. 2. Carefully remove the rubber plugs from the camber cover. 3. Disconnect knock sensor wiring connectors. 4. Remove...
Early models 1. Remove the intake manifold. 2. Carefully remove the rubber plugs from the camber cover. 3. Disconnect knock sensor wiring connectors. 4. Remove...
Air filter filter element
Withdrawal 1. Disconnect the connector (2) flow sensor / air temperature. 2. Turn away screws of fastening of the case of the air filter. Tightening torque 3...
Withdrawal 1. Disconnect the connector (2) flow sensor / air temperature. 2. Turn away screws of fastening of the case of the air filter. Tightening torque 3...
Air filter housing
Withdrawal 1. Remove the air filter housing outlet duct. 2. Disconnect the connector (2) flow sensor / air temperature. 3. Pull the front of the filter housing...
Withdrawal 1. Remove the air filter housing outlet duct. 2. Disconnect the connector (2) flow sensor / air temperature. 3. Pull the front of the filter housing...
Air filter housing outlet
Withdrawal 1. Remove the engine top cover. 2. Disconnect the crankcase ventilation hose from the air duct. 3. Remove from an air duct holders of collars of...
Withdrawal 1. Remove the engine top cover. 2. Disconnect the crankcase ventilation hose from the air duct. 3. Remove from an air duct holders of collars of...
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