Fuel Sender Information on Trucks with 6.6L Diesel - kw 6.6 LLY LB7 no start stall no fuel sensor tank gauge diesel IPC inaccurate inoperative operation gauge level

The following diagnosis might be helpful if the vehicle exhibits the described symptoms in the PI.

For 2004, there are two 6.6L diesel engines, LB7 VIN 1 and LLY VIN 2. When working with the fuel level sender, be aware of the following differences:

The LB7 uses a fuel level sender that ranges from 40 Ohms Empty to 250 Ohms Full. If sender replacement is necessary a new, more robust, fuel sender has been released. The new part numbers can be found in bulletin 04-08-49-019.

The LLY uses a fuel level sensor that ranges from 250 Ohms EMPTY to 40 Ohms FULL. The LLY already uses the new, more robust, fuel sender.

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Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

(04 Chevrolet Silverado) and (04 GMC Sierra)

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