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Discussion Starter · #1 ·
97 GMC Burb 5.7L Gas When turning the key it cranks fine for about 1 sec followed by a "run down" or "heavy" sounding crank but wont fire. This can be repeated with each try. I thought it was the battery due to the heavy run down sounding crank but that was replaced with no luck. I was thinking fuel pump, filter or maybe even an ignition control module, but given the distinct symptoms I though perhaps someone else had this problem. Any help is appreciated. Thank you.
 
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