My HHR is a 2010 LT with the 2.4 L engine and I never filled it with premium gasoline always regular but "Top Tier Gasoline" if possible. It has 26,000 miles on it, went on a cross country trip (2 adults) with cargo area fully loaded (back seat down), got 32.2779 m/p/g max.
The GM Ecotec engine, also known by its codename L850, is a family of all-aluminium inline-four engines, displacing between 1.4 and 2.5 litres.While these engines were based on the GM Family II engine, the architecture was substantially re-engineered for the new Ecotec application produced since 2000.
The electronic control module (ECM) on the Chevy HHR is the brains of the vehicle. Without it, the engine would not know how to run properly. When the ECM goes bad, you must replace it with a new or reconditioned ECM. The relatively straightforward process for removing the ECM requires the use of basic tools.
2007 Chevrolet HHR Repair Manual Online. Looking for a 2007 Chevrolet HHR repair manual? With Chilton's online Do-It-Yourself Chevrolet HHR repair manuals, you can view any year's manual 24/7/365.. Our 2007 Chevrolet HHR repair manuals include all the information you need to repair or service your 2007 HHR, including diagnostic trouble codes, descriptions, probable causes, step-by-step
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