Symptoms - Transfer Case. Chevrolet Avalanche

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2009 🢒 Avalanche - 4WD 🢒 Body Systems 🢒 Adjustable Pedals 🢒 Symptoms - Transfer Case

Important:

•	Perform the Diagnostic System Check - Vehicle before using the symptom tables in order to verify the following statements are true:

-	There are no diagnostic trouble codes (DTCs) set.

-	The control modules can communicate via the serial data link.

•	Review the system operation in order to familiarize yourself with the system functions. Refer to Transfer Case Description and Operation .

•	Inspect for aftermarket devices which could affect the operation of the automatic transfer case system. Refer to Checking Aftermarket Accessories .

•	Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

•	Inspect the automatic transfer case for the proper fluid level.

Faulty electrical connections or wiring may cause intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

•	Front Axle Will Not Engage

•	Front Axle Will Not Disengage

•	Transfer Case Shift Control Switch Inoperative

•	No Correction for Slip in All-Wheel Drive Mode

•	Transfer Case Shift Control Switch Indicator Always On - Two or More

•	Transfer Case Shift Control Switch Indicator Inoperative - One or More

•	Service Indicator Always On

•	Transfer Case High/Low Clutch Reset

•	Transfer Case Popping Noise

•	Transfer Case Whine or Rumble Noise

•	Transfer Case Growl or Grinding Noise

•	Transfer Case Grating Noise

•	Transfer Case Clunk in 2HI Only

•	Transfer Case Clunk in 4HI

•	Transfer Case Clunk in 4LO

•	Transfer Case Clunk during Acceleration and Deceleration

•	Transfer Case Shudder or Binding

•	Transfer Case Will Not Shift

•	Transfer Case Jumps Out of Gear

•	Transfer Case Leak Diagnosis