2000 GMC Sonoma engine surge while slowing down

Tiny
AUTOSAVOYNOT
  • MEMBER
  • 2000 GMC SONOMA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 113,000 MILES
My 2000 Sonoma's engine will surge while slowing down. It shifts fine while driving but when I apply the breaks it will rev up 2 times from 1000 rmp to 1500 rpm at about 20 mph about. Also, after I've driven a while then put it in park, it idles 500 rpms more than normal uless I shut it off & restart it. I got a new coil & wires this past winter but never got new plugs. Could it be something as simple as new plugs. It's got 113,000 miles on it.
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Wednesday, May 14th, 2008 AT 5:25 PM

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Tiny
MASTERTECHTIM
  • MEMBER
Yes. Definitely replace the plugs
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Wednesday, May 14th, 2008 AT 6:19 PM

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