1999 GMC Sierra irraticidleonlyatlowambienttemperature

Tiny
JAMESTUSS
  • MEMBER
  • 1999 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
Diagnostictestsshowleftbanklean&rightbankleanaftercheckenginelightappears
Saturday, December 13th, 2008 AT 6:16 PM

1 Reply

Tiny
SAUCEDO7
  • MEMBER
  • 3 POSTS
We had the same problem with our 2000 GMC Sierra. It had an irratic idle, took it to the chevy garage several times and they couldn't figure it out. I changed the fuel pressure regulator and it took care of the problem.
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Monday, December 15th, 2008 AT 7:28 PM

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