2003 GMC Sierra 1500 HD Questions

All 2003 GMC Sierra 1500 HD Questions

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I have had the ABS light come on at start up - not often and then it is gone.
I have a engine light test guage it comes up as PO0155 02 Sensor Heater Circuit Circuit Malfunction (Bank 2 Sensor1)Can I repair this myself? I need to get the truck a smog test but can't because the engine light is o...
Sometimes the lights would come on after running but now they have just stopped coming on all together....
While engine is running there is a ticking noise comming from the lifter.