Question about 1999 GMC Yukon Denali
1999 GMC Yukon seems to "backfire" about once a week. Afterward, it will start rough, then run fine after a few seconds. Rest of the time it runs fine too. Why does it backfire?
Look for vac leak at egr valve, when cold spray carb cleaner on and see if it speeds up the eng
Posted on Jun 27, 2009
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Posted on Jan 02, 2017
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