2000 GMC Sierra engine knock

2000 GMC SIERRA
107,000 MILES • V8 • 2WD • AUTOMATIC
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MADMANTOM
  • MEMBER
  • 1 POST
engine knocks when first started for about one or two minutes and then quiets down, sounds more like a ticking than a knock
Jan 22, 2009 at 8:02 PM
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PEAR69
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 1,482 POSTS
Your engine has hydraulic roller lifters in it. It sounds like one, or maybe a few are, wearing and taking a little time to "pump" up. It will do this especially during cold temperatures...Make sure your oil level is correct..
Jan 22, 2009 at 8:27 PM
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