2006 GMC Truck rough running, oil consumption

ALLENGG1

MEMBER
2006 GMC TRUCK
6.0L
V8
4WD
AUTOMATIC
220,000 MILES

Did headgaskets truck was fine, now running rough and consuming oil, seems to be getting sucked into the intake, this particular engine does not use a conventional pcv valve, what could the problem be

Monday, January 12th, 2015 AT 7:31 AM

3 Replies

HMAC300

MECHANIC
48,601 POSTS

Check the hose for blockage which is pcv return and it may be a gasket rubberon intake has slipped causing a vacuum leak. I assume truck has been scanned for codes and fuel pressure h as been checked with a gauge

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Monday, January 12th, 2015 AT 7:49 AM

JOHNNYT73

MECHANIC
924 POSTS

I believe there may be a bulletin out for this issue. Using redesigned valve covers to correct the oil consumption issue.

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Monday, January 12th, 2015 AT 8:25 AM

HMAC300

MECHANIC
48,601 POSTS

Truck must sit 15 minutes prior to checking oil per one tsb and on level ground as well as the pcv system must be checked for blockage which I've already sent the pic of where the hose is. The other tsb is essentially the same it just covers towing and higher rpm 3000 and above wil give you heavier oil ususage. IF not good do a consumption test on it.

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Monday, January 12th, 2015 AT 9:43 AM