I noticed a lot of you with LNF's are having this problem. there's a service update for it.
found this on an hhr forum.
#09126: Service Update for Inventory and Customer Vehicles-Charge Air Cooler Inlet Duct Detachment - (Jul 21, 2009)
Subject: 09126 -- Service Update for Inventory and Customer Vehicles - Charge Air Cooler Inlet Duct Detachment - Expires with Base Warranty
Models: 2008-2009 Chevrolet Cobalt SS, HHR SS
Equipped with a Manual Transmission
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THIS SERVICE UPDATE INCLUDES VEHICLES IN DEALER INVENTORY AND CUSTOMER VEHICLES THAT RETURN TO THE DEALERSHIP FOR ANY REASON. IT WILL EXPIRE AT THE END OF THE INVOLVED VEHICLE'S NEW VEHICLE LIMITED WARRANTY PERIOD.
Purpose
This bulletin provides a service procedure to install a new stud and retainer on certain 2008-2009 model year Chevrolet Cobalt SS and HHR SS vehicles equipped with a manual transmission. On these vehicles, the charge air cooler inlet duct may become detached and contact the high pressure fuel pump connector. This contact could eventually cause damage to the connector, causing the fuel pump to become inoperative. If this were to happen, the Engine Power Reduced message would illuminate in the DIC and the maximum vehicle speed would be reduced to 20 mph (32 km/h).
This service procedure should be completed as soon as possible on involved vehicles currently in dealer inventory and customer vehicles that return to the dealer for any type of service during the New Vehicle Limited Warranty coverage period.
Vehicles Involved
A list of involved vehicles currently in dealer inventory is available on the "Service Update Bulletin Information" link under the "Service" tab in GM GlobalConnect (US) or attached to the Dealer Communication (Canada) used to release this bulletin. Customer vehicles that return for service, for any reason, and are still covered under the vehicle's base warranty, and are within the VIN breakpoints provided below, should be checked for vehicle eligibility in the appropriate system listed below.
Year Division Model From Through
2008 Chevrolet Cobalt SS 87229258 8735153
2009 Chevrolet Cobalt SS 97100001 97254608
2008 Chevrolet HHR SS 8S581592 8S722574
2009 Chevrolet HHR SS 9S500006 9S621588
Important: Dealers are to confirm vehicle eligibility prior to beginning repairs by using the GM Vehicle Inquiry System (GMVIS). Not all vehicles within the above breakpoints may be involved.
Parts Information
Parts required to complete this service update are to be obtained from General Motors Service and Parts Operations (GMSPO). Please refer to your "involved vehicles listing" before ordering parts. Normal orders should be placed on a DRO = Daily Replenishment Order. In an emergency situation, parts should be ordered on a CSO = Customer Special Order.
Part Number Description Qty/ Vehicle
11570937 Stud, Chrg Air Clr Brkt Plt 1
90278102 Retainer, Chrg Air Clr 1
Service Procedure
(1) First Design Stud
(2) Second Design Stud
(3) Retainer Clip
Open the hood.
Locate the charge air cooler (CAC) duct (4).
Remove the CAC duct (4) off of the first design mounting stud (1).
Remove and discard the first design mounting stud (1).
Install the second design mounting stud (2).
Secure the CAC duct (4) onto the second design mounting stud.
Install the retainer clip (3) to the second design mounting stud. Ensure that the retainer clip is installed properly.
Close the hood.