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Old 02-07-2004, 11:26 PM   #1
Vagabond
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1993 Silverado K1500, used for snow plowing. MPG dropped by 1/2 in the last month

Checked engine, diagnostic said code 43, changed Knock sensor and problem did not change. Help.
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Old 02-09-2004, 12:28 PM   #2
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Re: 1993 Silverado K1500, used for snow plowing. MPG dropped by 1/2 in the last month

Go to the closest muffler shop and get a free diagnostic on your catalytic convertors. THat would be the easiest explained for the drop and the most common.
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