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International Automotive Technicians Network
Re: 2006 Cobalt no speedometer/erratic shift
Posted to Technical Discussion Forum on 7/22/2011 2 Replies

I looked closely at the battery. Even did voltage drop tests between the battery and the engine, underhood relay box etc. It was the wrong battery for the car and there was a fair amount of acid corrosion under the battery. It may have been an issue. Who knows... Login to read more.

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