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1999 GMC Sierra

Tiny
AKBUSHPILOT2006
  • MEMBER
  • 1999 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 170,000 MILES
I replaced brake pads and rotors and spark plugs and wires on my 99 gmc sierra. Before I replaced these items everything worked fine now The truck runs ruff and the four wheel drive will not work. I checked all the fuses. I double checked to make sure the right plugs were installed. Everything seems good cant imagine what I did wrong.
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Sunday, January 31st, 2010 AT 8:23 PM

1 Reply

Tiny
PEAR69
  • MECHANIC
  • 1,482 POSTS
What brand plugs and wires did you use? Does your engine have a distributer? If so then did you replace the dist. Cap and rotor? If the engine has coil packs, did you have the coil packs tested?
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Monday, February 1st, 2010 AT 6:30 AM

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