2003 GMC C1500 oxygen sensors

2003 GMC C1500
103,000 MILES • V8 • 4WD • AUTOMATIC
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PIPER34
  • MEMBER
  • 1 POST
I was trying to change out my O2 sensors and the plugs were different. What can you tell me about this. My truck has 2- 4 prong O2 sensors and the O2 sensors I purchased have 5 prong. Have you heard of this?? I double checked with my parts guy and he told me that they were the right sensors..
Jun 9, 2010 at 10:18 AM
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BLUELIGHTNIN6
  • ✓ASE Certified Mechanic
  • 16,542 POSTS
  • ASE Certified Mechanic
sounds like you got aftermarket O2 sensors. if you purchase the OEM sensor straight from the dealer it will have the exact same wiring.
Jun 9, 2010 at 3:11 PM
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