In this video I outline possible causes including diagnosis and repair of common issues effecting Chevy, GMC and Cadillac trucks and SUV’s such as Chevy Silverado, Tahoe, GMC Sierra, Yukon, Cadillac Escalade and others with a symptom of no 4X4 operation, the transfer case range switch buttons won’t illuminate and/or there is a service 4X4 message displayed on the drivers information display. This video also contains helpful information for those replacing the transfer case shift (encoder) motor. Watch this video for more information.

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