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    2013 Silverado 5.3 lifter noise

    My truck has 45,000 miles on it but when I cold start it one or two lifters sound like someones hammering on the engine. Used Mobil 1 5w30 since day one and wanted to ask should I try some type of additive or something before I take it to the dealer? I had a 2011 that my engine had to be...
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    AC Delco additives

    Do they still sell this? ACDelco Oil Supplememnt 992869 500ml Engine Oil Supplement ACDelco Engine Oil Supplement is a multi-purpose additive concentrate designed to help eliminate lifter sticking, reduce valve train noise, reduce
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