Code P06DD No Or Low Oil Pressure

Makes:

Cadillac

Chevrolet

GMC

Vehicles Affected:

2016-2019 Cadillac CTS-V 6.2L LT4
2015-2019 Cadillac Escalade 6.2L L86
2016-2019 Chevrolet Camaro 6.2L LT1 LT4
2014-2019 Chevrolet Corvette 6.2L LT1 LT4
2014-2018 Chevrolet Silverado 4.3L LV3, 5.3L L83, 6.2L L86
2019 Chevrolet Silverado LD 4.3L LV3, 5.3L L83, 6.2L L86
2015-2019 Chevrolet Suburban 5.3L L83
2015-2019 Chevrolet Tahoe 5.3L L83
2014-2018 GMC Sierra 4.3L LV3, 5.3L L83, 6.2L L86
2019 GMC Sierra Limited 4.3L LV3, 5.3L L83, 6.2L L86
2015-2019 GMC Yukon 5.3L L83, 6.2L L86
2015-2019 GMC Yukon XL 5.3L L83, 6.2L L86

Condition:

Vehicle setting code P06DD, no or low oil pressure, oil control valve may be stuck off commanding high oil pressures (95 psi) and or oil pump face may be damaged.

Cause:

Tensioner spring in timing chain guide may be “short” not fully seating into guide pivot end.

Correction:

Replace the timing chain tensioner guide. If the oil pump face is damaged and or worn thru replace the oil pump. Inspect bearings for damage and wear due to debris from the oil pump.

Service Procedure:

Tensioner spring in timing chain guide may be “short” not fully seating into guide pivot end.

GM Timing Chain Guide

Cycling Oil Pump Control Valve will not cause changes in oil pump response.
1) Short spring not reaching the pivot
Also, a broken tensioner shoe may allow the spring to rub a hole in the oil pump.

GM Timing Chain Guide Broken

The hole in the oil pump

GM Oil Pump With Hole