Fuel Gauge Reading - keywords calibration card ECM fuel gage inaccurate sender

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

For vehicles built (L66 only) after the countermeasure or vehicles build on or after 5GZCZ33D96S823055 have noble metal fuel sender card / cal, change and the potential of the fuel gauge fill table in the ECM is off calculations.

What could happen, after a fill up, the gauge will read full or beyond full. After a couple of ignition cycles and/or minimal driving distance, the fuel gauge will read less.

We are aware and are proactively working on a service calibration.

Please follow this diagnostic or repair 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.