Malfunction Indicator Lamp On - Check Engine Light, DTCs P0011, P0014, P0021, P0024, P0341, P0346, P0366 or P0391 Set (Check Camshaft End Play and Replace Affected Cylinder Head, if Necessary). Cadillac SRX 2008

Subject:

Malfunction Indicator Lamp On -- Check Engine Light, DTCs P0011, P0014, P0021, P0024, P0341, P0346, P0366, or P0391 Set (Check Camshaft End Play and Replace Affected Cylinder Head, if Necessary)

Models:

2007-2008 Buick LaCrosse, Allure (Canada only)

2008 Buick Enclave

2007-2008 Cadillac CTS, SRX, STS

2008 Chevrolet Equinox, Malibu

2007-2008 GMC Acadia

2007-2008 Pontiac G6

2008 Pontiac G8, Torrent

2007-2008 Saturn AURA, OUTLOOK

2008 Saturn VUE

with 3.6L High Feature V6 Engine (VINs T, V, 7 -- RPOs LP1, LLT, LY7)

Attention:

This bulletin also applies to any of the above models that may also be export vehicles.

Condition

Some customers may comment that the check engine light is on.

Upon investigation, the technician may find one or more of the following DTCs stored:

•

P0011

•

P0014

•

P0021

•

P0024

•

P0341

•

P0346

•

P0366

•

P0391

For 2007-08 Buick Enclave, GMC Acadia and Saturn Outlook with DTCs P0341, P0346, P0366 or P0391 and other models with DTCs P0011, P0014, P0021, P0024, P0341, P0346, P0366 or P0391, if routine diagnosis using SI does not reveal any obvious cause, remove the camshaft cover and check the camshaft end play on both camshaft in that cylinder head using one of the procedures listed below. The DTC will determine which camshaft should be checked (bank 1 or bank 2). If the camshaft end play is over 0.40 mm (0.016 inch), the cylinder head assembly should be replaced.

Note: Before reinstalling the cam cover on the engine, remove the front cam cap and lubricate the cam thrust surfaces in the cam cap and on the camshafts with GM Engine Oil Supplement. P/N 88862586, or equivalent.

Important: Be sure to use SI documents for 2008 model year to set the camshaft timing on 2007-2008 3.6L engines.

Camshaft End Play Measurement Procedure

Remove the camshaft cover from the suspect cylinder head.

Two methods for measuring camshaft end play:

Method 1: Dial Indicator

•

Set-up a dial indicator on the camshaft to be measured. Set the dial indicator to measure the axial movement of the camshaft. To minimize measurement error, the dial indicator needs to be on the same axis as the camshaft. A magnetic mount can be placed on the frame rail or a piece of steel plate can be bolted to the top of the head as a reference surface for the dial indicator. The dial indicator should have 0.1 mm (.001 in) of resolution.

•	Position a screwdriver or small pry bar between the camshaft cap and camshaft lobe. Apply force to move the camshaft rearward.

•	Be cautious not to damage the camshaft lobe while applying this force.

•	Zero the dial indicator.

•	Apply force to move the camshaft forward (towards the camshaft phasers).

•	Read the dial indicator. This is the end play of the camshaft shaft.

Notice: Do not use the phaser bolt as a pry point. This may cause damage to the camshaft sensor target wheel or the head to camshaft cover sealing surface.

Method 2: Caliper

The caliper should have 0.1 mm (.001") of resolution.

•	Position a screwdriver or medium pry bar between the camshaft cap and camshaft lobe. Be cautious not to damage the camshaft lobe while applying this force.

•	Apply force to move the camshaft rearward.

•	Measure and record the distance between the camshaft cap and the camshaft lobe.

•	Re-measure and record the distance between the camshaft cap and camshaft lobe. Subtract the two readings; this is the camshaft shaft end play.

Parts Information

Part Number	Description
12626907 ( Left LY7 Standard All Models Excluding Enclave, Acadia, Outlook)	Complete Cylinder Head Assembly
12626908 (Right LY7 Standard All Models Excluding Enclave, Acadia, Outlook)	Complete Cylinder Head Assembly
12626909 (Left LY7 High Output Enclave, Acadia, Outlook)	Complete Cylinder Head Assembly
12626910 (Right LY7 High Output Enclave, Acadia, Outlook)	Complete Cylinder Head Assembly
12626911 (Left LLT)	Complete Cylinder Head Assembly
12626912 (Right LLT)	Complete Cylinder Head Assembly
12626913 (Left LP1)	Complete Cylinder Head Assembly
12626914 (Right LP1)	Complete Cylinder Head Assembly
11518863	Cylinder Head Bolt (8 required per head)
12591003 (LLT Only)	Fuel Injection Fuel Rail Crossover Tube
12591197 (LLT Only)	Fuel Feed Intermediate Pipe

Important: When ordering the cylinder head gasket, the kit does not include the M11 head bolts or exhaust manifold gaskets, which will need to be ordered separately.

For part numbers and usage of necessary gaskets, refer to Group 00 6-Cylinder Engine of the appropriate Parts Catalog. Saturn Retailers should refer to the appropriate Parts & Illustration Catalog for the vehicle.