1999 GMC Sierra

1999 GMC SIERRA
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DARRYLBENALLY
  • MEMBER
  • 1 POST
Engine Performance problem
1999 GMC Sierra V8 Two Wheel Drive Automatic

my truck has a real big problem im tryin to figure out. it almost goes out when i press gas pedal and idles low and during start up is ok until a few seconds it idles low again
Aug 20, 2009 at 11:07 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Clean out the idle air control valve and test the throttle position sensor and manifold absolute pressure sensor
Aug 20, 2009 at 11:30 PM
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