2016 - 2017 Corvette: Service Bulletin: #PIP5330B: Coolant Loss And/Or Coolant Odor

#PIP5330B: Coolant Loss And/Or Coolant Odor - (Jun 15, 2017)

Subject:

Coolant Loss And/Or Coolant Odor

Brand:	Model:	Model Year:		VIN:		Engine:	Transmission:
Brand:	Model:	from	to	from	to	Engine:	Transmission:
Cadillac	CTS-V	2016-2017		All	All	6.2L LT4	All
Cadillac	Escalade	2015-2017		All	All	6.2L L86	All
Chevrolet	Camaro	2016-20117		All	All	6.2L LT1 LT4	All
Chevrolet	Corvette	2016-2017		All	All	6.2L LT1 LT4	All
Chevrolet	Silverado	2014-2017		All	All	4.3L 5.3L 6.2L LV3 L83 L86	All
Chevrolet	Suburban	2015-2017		All	All	5.3L L83	All
Chevrolet	Tahoe	2015-2017		All	All	5.3L L83	All
GMC	Sierra	2014-2017		All	All	4.3L 5.3L 6.2L LV3 L83 L86	All
GMC	Yukon	2014-2017		All	All	5.3L 6.2L L83 L86	All

Supersession Statement:

This PI was superseded to update Engine RPO and modules. Please discard PIP5330A.

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

Condition/Concern: A vehicle may have a concern with coolant loss and/or coolant odor after driving the vehicle.

Recommendation/Instructions

If the coolant is low pressure test the cooling system looking for leaks at the outer head bolts. See below:

If a leak is found the head with the concern will need to be replaced.

Warranty Information

For vehicles repaired under warranty use:

Labor Operation	Description	Labor Time
4061770	Cylinder Head Replacement - Right Side	Use Published Labor Operation Time
4061790	Cylinder Head Replacement - Left Side	Use Published Labor Operation Time

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.