GdH
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Check engine light flashing then goes away
GdH replied to Asells's topic in 2014-2018 Silverado 1500 & Sierra 1500
2012 GMC Yukon Denali. CEL comes on and immediately goes off and the truck will hesitate or give a thump. Happening more often and usually when in traffic going 30 mph or less. At the same time the door locks will click. All 3 things at once within a second. Then drives normal. Any ideas?
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