20 Most Recent 2006 GMC Sierra - Page 6 Questions & Answers

You need a GM scanner to repd the codes for the airbag light.

It does not matter if you have an Orifice or ThermostaticExpansion Valve, on any A/C System or equipmentThe valve has to be at the inlet to the Evaporator, inorder to boil off refrigerant.There you go. In the evaporator inlet & coveredbuy a hose & a big nut

Code Reader or Scan ToolOdd you ask thatAre you unaware that those systems OBD1 & 2have been on ALL Vehicles for 30 years?What have you done in the past?

Check your heated O2 sensor.

check wiring to front deployment sensors, maybe Mice got hungry ! they can destroy lots of stuff in short time !

I suggest check in this link your 2002-GMC-Sierra Owners Manual.Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.Thank you for using FixYa, have a nice day.