Diagnose and fix P06DD low oil pressure
GM has issued a service bulletin #PIP540B to address a P06DD low oil pressure or no oil pressure on the vehicles listed below. GM has determined that the oil pump solenoid valve may become stuck or the oil pump face may become damaged because the timing chain guide spring may be too short or not seating properly in the guide pivot. A broken tensioner shoe can allow the spring to rub a hole into the oil pump causing it to fail.
If the oil pump is damaged, check the engine bearings for signs of wear from metal particles. Replace if necessary.
Diagnose P06DD low oil pressure
Using a bi-directional scan tool, examine the oil pressure while commanding the oil control solenoid on and off. The pressure must change by at least 4-psi to confirm the solenoid valve is working. If it does not change, drain the oil and check for the presence of metal particles in the oil. If you find any, remove the oil pan and check the condition of the oil pump and main bearings.
In many cases you can get by with replacing the oil pump and/or the timing chain guide tensioner.
Vehicles affected by service bulletin #PIP540B
Cadillac CTS-V 2016-2019 6.2L LT4
Cadillac Escalade 2015-2019 6.2L L86
Chevrolet Camaro 2016-2019 6.2L LT1 LT4
Chevrolet Corvette 2014-2019 6.2L LT1 LT4
Chevrolet Silverado 2014-2018 4.3L LV3 5.3L L83 6.2L L86
Chevrolet Silverado LD 2019 4.3L LV3 5.3L L83 6.2L L86
Chevrolet Suburban 2015-2019 5.3L L83
Chevrolet Tahoe 2015-2019 5.3L L83
GMC Sierra 2014-2018 4.3L LV3 5.3L L83 6.2L L86
GMC Sierra Limited 2019 4.3L LV3 5.3L L83 6.2L L86
GMC Yukon 2015-2019 5.3L L83 6.2L L86
GMC Yukon XL 2015-2019 5.3L L83 6.2L L86
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Posted on by Rick Muscoplat