How to service a 4WD Lite on a c0327?

Pay particular attention to Connector C1, pin A7 at the TCCM. Also check the TCCM, body, chassis and engine ground. Remove and clean any material that may cause high resistance in the circuit i.e. paint, undercoating, etc. Ensure these grounds are secure and perform a voltage drop test and record the readings for these grounds.

Is there a problem with GM service 4WD Lite?

GM has issued a technical service bulletin (TSB) 3061F to address problem with Service 4WD lite on C0327 C0327 P0836 P0500 on the following vehilces The problem shows up in “K” style trucks equipped with 246 and 263 transfer cases and results in trouble codes C0327, C0327, P0836, P0500.

What’s the trouble code on a GM c0327?

In “T” style trucks with 126 and 226 transfer cases, you may find just trouble code C0327. GM recommends following these diagnostic procedures: For “K” trucks with 246 and 263 transfer cases, Visually check the TCCM wiring harness for pinched/chaffed concerns. In particular check the TCCM harness chaffing at the brake cable release spring.

Where is DTC c0327 stored on a Chevy Silverado?

29,000 miles (12/29/06) – code C0327 stored. followed TSB to ground G110 on frame. Cleaned ground and reinstalled. cleared codes and rechecked all connections at TCCM. all ok. 44,700 miles (10/22/07) – no failure codes stored. needs re-programmed. re-programmed transfer case module. 55,300 miles (8/15/08) – found DTC C0327 in TCM.

Why is my SVC 4WD light not working?

My “SVC 4WD” light is on and has been for about a year. If I turn it, nothing engages – no hi, no lo, no noises. I pulled the dash apart and the plug is firmly into the switch. There is also power going to the switch. 1. A Faulty Switch 2. A Failed Transfer Case Shift Motor 3. TCCM Problem 4. CTM? Problem