Question about 2002 GMC Envoy
Transfer case control module location on 2002 gmc envoy
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Posted on Jan 02, 2017
About 45% of all transmission problems are due to a defective battery, its components and the charging system. Make sure you have the correct battery in the vehicle and inspect all items relating to the charging system and the battery. The vehicle should charge between 13,5 to 14.5 volts. The condition of the belts is part of this inspection. If all of this is A-ok then get a scanner and pull the codes in the PCM.
Remember once light is illuminated for a item that item no longer works. Once you've gotton to this point let me know and I'll walk you threw it. Hopefully its just a weak or incorrect battery or something along those lines. Good luck and keep me posted
Posted on Mar 09, 2010
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Mar 26, 2015 | 2002 GMC Envoy
Ground Circuit for ground
Diagnostic enable circuit for an open or high resistance
Transfer case shift control switch connector
If more than one code is stored, the first code will blink, followed by a 3 second pause and then the second code will blink.
This sequence will continue until PIN 13 on the DLC is no longer grounded.
If the TCCM will not communicate the presence or absence of DTCs, test the above circuits in Self-Test Step 2. If the circuits are complete, then replace the TCCM. Refer to Transfer Case Shift Control Module Replacement .
Let me know if you have any codes , I have code definitions an procedures.
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