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 3:18 AM
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BLUELIGHTNIN6
  • ✓Experienced Mechanic
  • 16,542 POSTS
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 8:11 AM
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