Fuel Tank Replacement Tahoe/Yukon
Removal Procedure
- Remove negative battery cable.
- Drain the fuel from the tank. Refer to Fuel Tank Draining .
- Raise the vehicle.
- Remove the fuel tank off-road shield, if equipped.
- Loosen the filler neck hose clamp at the fuel tank.
- Disconnect the fuel tank filler neck from the fuel tank.
- Support the fuel tank and remove the tank straps and insulator strips, if equipped.
- Lower the fuel tank shield.
- Lower the fuel tank. Disconnect the fuel feed and vapor hoses.
- Disconnect the electrical connections at the sender.
- Remove the fuel sender assembly and seal ring, using tool J 39765 . Discard the old seal ring. Purge the tank, if the tank is being repaired.
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
Installation Procedure
- Install the new seal ring and reinstall the sender using tool J 39765 .
- Raise the tank slightly and reconnect the fuel feed and vapor hoses and the electrical connections at the sender.
- Raise the tank fully.
- Reinstall the fuel tank filler neck to the tank. Tighten the clamp.
- Install the fuel tank brackets with insulator strips in place.
- Install the fuel tank off-road shield, if equipped.
- Replenish the fuel in the tank. Reinstall the fuel tank filler cap.
- Reconnect the negative battery cable. If a memory retention device was not used, please reset (to the extent possible) all devices that lost their memory after the battery was disconnected.
- Check for fuel leaks.
Notice: Tighten the strap fasteners by steps, alternating between the fasteners, until the specified torque is reached. A failure to tighten the strap fasteners as specified will cause the bottom of the tank to flex upward. This will result in the fuel gauge indicating that there is fuel remaining in the tank when the tank is empty.
Tighten
Tighten the strap nuts to 45 N·m (33 lb ft).
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
| 9.1. | Turn ON the ignition switch for 2 seconds. |
| 9.2. | Turn OFF the ignition switch for 10 seconds. |
| 9.3. | Again, turn the ignition switch to the ON position. |
| 9.4. | Check for fuel leaks. |
Fuel Tank Replacement Suburban
Removal Procedure
- Disconnect negative battery cables.
- Drain the fuel from the tank. Refer to Fuel Tank Draining .
- Raise the vehicle.
- Remove the fuel tank off-road shield, if equipped.
- Loosen the filler neck hose clamp at the fuel tank and disconnect the fuel tank filler neck from the fuel tank.
- Support the fuel tank and remove the tank straps and insulator strips, if equipped.
- Lower fuel tank shield.
- Lower the fuel tank. Disconnect the fuel feed and vapor hoses. Disconnect the electrical connections at the sender.
- Remove the fuel sender assembly and seal ring, using tool J 39765 . Discard the old seal ring. Purge the tank, if the tank is being repaired.
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
Installation Procedure
- Install the new seal ring and reinstall the sender using tool J 39765 .
- Raise the tank slightly and reconnect the fuel feed and vapor hoses and the electrical connections at the sender.
- Raise the tank fully.
- Reinstall the fuel tank filler neck to the tank. Tighten the clamp.
- Install the fuel tank brackets with insulator strips in place.
- Install the fuel tank off-road shield, if equipped.
- Replenish the fuel in the tank. Reinstall the fuel tank filler cap.
- Reconnect the negative battery cable. If a memory retention device was not used, please reset (to the extent possible) all devices that lost their memory after the battery was disconnected.
- Check for leaks.
Notice: Tighten the strap fasteners by steps, alternating between the fasteners, until the specified torque is reached. A failure to tighten the strap fasteners as specified will cause the bottom of the tank to flex upward. This will result in the fuel gauge indicating that there is fuel remaining in the tank when the tank is empty.
Tighten
Tighten the strap nuts to 45 N·m (33 lb ft).
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
| 9.1. | Turn ON the ignition switch for 2 seconds. |
| 9.2. | Turn OFF the ignition switch for 10 seconds. |
| 9.3. | Again, turn the ignition switch to the ON position. |
| 9.4. | Check for fuel leaks. |
Fuel Tank Replacement Extended Cab Side Tank
Removal Procedure
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
- Disconnect negative battery cables.
- Drain the fuel from the tank. Refer to Fuel Tank Draining .
- Raise the vehicle.
- Loosen the filler neck hose clamp at the fuel tank and disconnect the fuel tank filler neck from the fuel tank.
- Support the fuel tank and remove the tank straps and insulator strips, if equipped.
- Lower the fuel tank shield.
- Lower the fuel tank.
- Disconnect the fuel hoses and lines. Disconnect the electrical connections at the sender.
- Remove the fuel sender assembly and seal ring, using tool J 39765 . Discard the old seal ring. Purge the tank, if the tank is being repaired.
Installation Procedure
- Install the new seal ring.
- Use tool J 39765 in order to reinstall the sender.
- Raise the tank slightly and reconnect the fuel hoses, the lines, and the electrical connections at the sender.
- Raise the tank fully.
- Install the fuel tank shield.
- Reinstall the fuel tank filler neck to the tank.
- Tighten the clamp.
- Install the fuel tank brackets with insulator strips in place.
- Replenish the fuel in the tank.
- Reinstall the fuel tank filler cap.
- Reconnect the negative battery cable. If a memory retention device was not used, please reset (to the extent possible) all devices that lost their memory after the battery was disconnected.
- Check for leaks.
Notice: Tighten the strap fasteners by steps, alternating between the fasteners, until the specified torque is reached. A failure to tighten the strap fasteners as specified will cause the bottom of the tank to flex upward. This will result in the fuel gauge indicating that there is fuel remaining in the tank when the tank is empty.
Tighten
Tighten the strap nuts to 45N·m (33 lb ft).
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Fuel Tank Replacement Pickup Side Tank
Removal Procedure
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
- Remove negative battery cables.
- Drain the fuel from the tank. Refer to Fuel Tank Draining .
- Raise the vehicle.
- Loosen the filler neck hose clamp at the fuel tank and disconnect the fuel tank filler neck from the fuel tank.
- Support the fuel tank and remove the tank straps and insulator strips, if equipped.
- Remove the frame mounted bracket.
- Lower the fuel tank shield.
- Lower the fuel tank.
- Disconnect the fuel hoses and lines. Disconnect the electrical connections at the sender.
- Remove the fuel sender assembly and seal ring, using tool J 39765 . Discard the old seal ring. Purge the tank, if the tank is being repaired.
Installation Procedure
- Install the new seal ring.
- Use tool J 39765 in order to reinstall the sender.
- Raise the tank slightly and reconnect the fuel hoses, the lines, and the electrical connections at the sender.
- Raise the tank fully.
- Install the fuel tank shield.
- Reinstall the fuel tank filler neck on to the tank.
- Tighten the clamp.
- Install the frame mounted bracket.
- Install the fuel tank brackets with the insulator strips in place.
- Replenish the fuel in the tank.
- Reinstall the fuel tank filler cap.
- Reconnect the negative battery cable. If a memory retention device was not used, reset (to the extent possible) all of the devices that lost their memory after the battery was disconnected.
- Check for leaks.
Notice: Tighten the strap fasteners by steps, alternating between the fasteners, until the specified torque is reached. A failure to tighten the strap fasteners as specified will cause the bottom of the tank to flex upward. This will result in the fuel gauge indicating that there is fuel remaining in the tank when the tank is empty.
Tighten
Tighten the strap nuts to 45 N·m (33 lb ft).
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Fuel Tank Replacement Cab and Chassis Side Tank
Removal Procedure
- Disconnect negative battery cables.
- Drain the fuel from the tank. Refer to Fuel Tank Draining .
- Raise the vehicle.
- Loosen the filler neck hose clamp at the fuel tank and disconnect the fuel tank filler neck from the fuel tank.
- Support the fuel tank and remove the tank straps and insulator strips, if equipped.
- Lower the fuel tank shield.
- Lower the fuel tank.
- Disconnect the fuel hoses and lines. Disconnect the electrical connections at the sender.
- Remove the fuel sender assembly and seal ring, using tool J 39765 . Discard the old seal ring. Purge the tank, if the tank is being repaired.
Installation Procedure
- Install the new seal ring.
- Use tool J 39765 in order to reinstall the sender.
- Raise the tank slightly and reconnect the fuel hoses, the lines, and the electrical connections at the sender.
- Raise the tank fully.
- Install the fuel tank shield.
- Reinstall the fuel tank filler neck to the tank.
- Tighten the clamp.
- Install the fuel tank brackets with the insulator strips in place.
- Replenish the fuel in the tank.
- Reinstall the fuel tank filler cap.
- Reconnect the negative battery cable. If a memory retention device was not used, reset (to the extent possible) all devices that lost their memory after the battery was disconnected.
- Check for leaks.
Notice: Tighten the strap fasteners by steps, alternating between the fasteners, until the specified torque is reached. A failure to tighten the strap fasteners as specified will cause the bottom of the tank to flex upward. This will result in the fuel gauge indicating that there is fuel remaining in the tank when the tank is empty.
Tighten
Tighten the strap nuts to 45N·m (33 lb ft).
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Fuel Tank Replacement Cab and Chassis Rear Tank
Removal Procedure
- Disconnect the negative battery cables.
- Drain the fuel from the tank. Refer to Fuel Tank Draining .
- Raise the vehicle.
- Remove the fuel tank off-road shield, if equipped.
- Loosen the filler neck hose clamp at the fuel tank and disconnect the fuel tank filler neck from the fuel tank.
- Support the fuel tank and remove the tank straps and insulator strips, if equipped.
- Lower the fuel tank. Disconnect the fuel hoses and lines. Disconnect the electrical connections at the sender.
- Remove the fuel sender assembly and seal ring, using tool J 39765 . Discard the old seal ring. Purge the tank, if the tank is being repaired.
Installation Procedure
- Install the new seal ring.
- Use tool J 39765 in order to reinstall the sender.
- Raise the tank slightly and reconnect the fuel hoses, the lines, and the electrical connections at the sender.
- Raise the tank fully.
- Reinstall the fuel tank filler neck to the tank.
- Tighten the clamp.
- Install the fuel tank brackets with the insulator strips in place.
- Install the fuel tank off-road shield, if equipped.
- Replenish the fuel in the tank.
- Reinstall the fuel tank filler cap.
- Reconnect the negative battery cable. If a memory retention device was not used, reset (to the extent possible) all devices that lost their memory after the battery was disconnected.
- Check for leaks.
Notice: Tighten the strap fasteners by steps, alternating between the fasteners, until the specified torque is reached. A failure to tighten the strap fasteners as specified will cause the bottom of the tank to flex upward. This will result in the fuel gauge indicating that there is fuel remaining in the tank when the tank is empty.
Tighten
Tighten the strap nuts to 45N·m (33 lb ft).
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
