1999 GMC Sierra

1999 GMC SIERRA
170,000 MILES • V8 • 4WD • AUTOMATIC
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AKBUSHPILOT2006
  • MEMBER
  • 1 POST
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.
Jan 31, 2010 at 8:23 PM
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PEAR69
  • CAR REPAIR CONTRIBUTOR
  • 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?
Feb 1, 2010 at 6:30 AM
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