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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Self-Diagnostics - 4.3L >> Diagnostic Tests >> DTC P0135, P0141 Or P0155: Ho2S Heater Circuit (Bank 1 & 2, Sensor 1 & 2) >> Test Description

Test Description

The numbers below refer to the step numbers in the diagnostic procedures.

  1. 7 -  With no fault present, the test light will blink once per second.
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