This is what the dealer handed me
#PIP3535A: Whine Noise From Timing Chain Area - (Aug 10, 2009)
Subject: Whine Noise From Timing Chain Area
Models: 2002-2005 Chevrolet Cavalier
2004-2010 Chevrolet Cobalt (Including Cobalt SS)
2010 Chevrolet Equinox
2006-2010 Chevrolet HHR (Including HHR SS)
2004-2010 Chevrolet Malibu (Including Hybrid)
2004-2005 Chevrolet Malibu Classic
2010 GMC Terrain
2002-2004 Oldsmobile Alero
2007-2010 Pontiac G5
2006-2010 Pontiac G6
2002-2005 Pontiac Grand Am, Sunfire
2005-2006 Pontiac Pursuit (Canada Only)
2006-2009 Pontiac Solstice (Including GXP)
2007-2010 Saturn Aura (Including Hybrid)
2003-2007 Saturn Ion (Including Redline)
2001-2005 Saturn L Series
2007-2009 Saturn Sky, (Including Redline)
2002-2010 Saturn Vue (Including Hybrid)
2003-2010 Saab 9-3
With any of the following engines:
2.0L Engine (LSJ)
2.0L Engine (LNF)
2.2L Engine (LAP)
2.2L Engine (L61)
2.4L Engine (LE5)
2.2L Engine (LE8)
2.4L Engine (LE9)
2.4L Engine (LAF)
2.4L Engine (LAT)
2.0L Engine (B207)
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This PI was superseded to update model years and engines involved. Please discard PIP3535.
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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
A whine noise from the front of the engine may be experienced if the balance shaft tensioner has ratcheted out, causing the balance shaft chain to be too tight. In rare instances the balance shaft tensioner will ratchet out during service of the cylinder head, timing chain or if the water pump is replaced without using the water pump sprocket holding tool (J43651). This will cause the balance shaft chain to be too tight, which can cause a whine noise from the front of the engine.
Recommendation/Instructions:
Before attempting repairs, ensure that the noise is definitely abnormal by comparing the noise to other known good vehicles. If the noise is abnormal and the noise was not present previously, the balance shaft chain tensioner may need to be reset or replaced. Follow eSI repair procedures and reset/replace the balance shaft chain tensioner as needed.