How to Diagnose and Repair Chevy Blazer and GMC Jimmy 4WD \ 4x4 Issues

Replacement S10 \ Blazer 4WD front differential actuator: http://amzn.to/2Ems7Db
Replacement transfer case vacuum switch can be found here: http://amzn.to/2EgB7x4

This video is intended to help diagnose and repair four-wheel-drive issues that are common to Chevy Blazer, S10 Pickup, GMC Jimmy, and other GM 4WD SUVs and trucks. While there are other possible reasons why a 4WD system would not engage such as the transfer case encoder motor and computer, the possible reasons I've pointed out in this video are quite common and easiest to diagnose. The 4wd vacuum actuator is one of the easiest ways to determine where the problem is on your vehicle.

Replacement S10 \ Blazer 4WD front differential actuator: http://amzn.to/2Ems7Db
Replacement transfer case vacuum switch can be found here: http://amzn.to/2EgB7x4

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Due to factors beyond the control of Mark Jenkins, I cannot guarantee against improper use or unauthorized modifications of this information. Mark Jenkins assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. Mark Jenkins recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of Mark Jenkins, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not Mark Jenkins.