A faulty cam sensor can cause no starts, erratic idle and multiple check engine lights. Replace your faulty sensor with this OE sensor from DHD.
2001-2004.5 LB7 Duramax Trucks and Vans
Duramax Cam Position Sensor
USA: 24 Month / Unlimited Mile Limited Warranty (Parts Only).
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California Residents: Prop 65 Warning
WARNING: Cancer and Reproductive Harm