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engine knock at start up 2000gmc
I have a 2000 gmc sierra 5.3 and when you first start it up when the truck sits overnight, there is a low end knock that last about 30 secs. I ran fuel and engine additives and still didnt work. Love this truck but this is annoying. Any suggestions or solutions. Has done this for over a year now.
Thx
bud
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