I stumbled across this the other day after not seeing it for years . Freek on css.net found this a long time ago and posted it ...all credit is his . GM has since removed it from Dealerworld. AIP3252 MODELS: 206-2007 CHEVROLET COBALT, COBALT SS 2006-2007 CHEVROLET HHR 2006-2007 CHEVROLET MALIBU 2007 PONTIAC G5 2006-2007 PONTIAC G6 2006 PONTIAC PURSUIT(CANADA ONLY) 2006-2007 PONTIAC SOLSTICE 2006-2007 SATURN ION REDLINE 2007 SATURN SKY BUILT BETWEEN 4/1/06 - 11/1/06 WITH ANY OF THE FOLLOWING ENGINES 2.0 ENGINE (VIN P - RPO LSJ) 2.2 ENGINE (VIN D OR F - RPO L61) 2.4 ENGINE (VIN B OR P - RPO LE5) The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI. CONDITION/CONCERN: On rare occasions, a tick or rattle noise may be heard from behind the front cover of the engine and/or pieces of a timing chain roller may be found during an oil change. This may be the result of a timing chain concern. Non-heat treated timing chain rollers were randomly installed in the assembly line hoppers. He advised that this happened sometime between 4/1/06 - 11/1/06 so it can randomly affect late 2006 - early 2007 models. RECOMMENDATION/INSTRUCTIONS: If this concern is experienced, inspect the timing chain for missing or damaged timing chain rollers. If a missing or damaged timing chain roller is found, replace the timing chain and gears using the part numbers currently listed in the parts catalog. 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.