Low Oil or Add Oil DIC Messages

A Low Oil or Add Oil message may be displayed on the Driver Information Center (DIC) on some 2019 Silverado 1500, Sierra 1500; 2020-2021 Silverado 1500, Silverado 2500/3500, Sierra 1500, Sierra 2500/3500; 2021 Tahoe, Suburban, Yukon, and Escalade models equipped with the 5.3L V8 engine (RPO L82, L84), 6.2L V8 engine (RPO L87) or 6.6L V8 engine (RPO L8T). (Fig. 18) The DIC message may display prior to the first oil change.

Fig. 18

The oil level condition may be caused by new engine RTV sealant leaching silicone into the engine oil.

When the silicone leaches into the oil, it can contribute to aeration of the oil and cause an erroneous oil level switch response. During normal engine operation, the Engine Control Module (ECM) checks the oil level dynamically between the RPM range of 1,000-1,400 RPM. Other Small Block engine RPOs check the oil level at idle.

The oil condition will most likely occur before the first scheduled oil change or after the recent addition of new RTV sealant, for example, during an oil pan replacement. In addition, the new one-piece oil pan design (Fig. 19) used on these engines may also increase the occurrence of this condition.


Fig. 19


If this condition is found, verify the engine oil level is full. Also check that there are not any oil level switch-related DTCs set and that the oil switch reads OK using GDS 2 (engine off/ignition on).

If DTCs are not present, perform an oil and filter change and then re-evaluate vehicle.

– Thanks to Bryan Salisbury

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