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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 12, 2019
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Open Help Requests for GM
Help Request Answers
1999 Chevrolet K2500 Suburban 5.7L front differential VIN: 1GNGK26R7X
vehicle has a 6 inch suspension lift, also around 35 inch mud tires, customer bought the vehicle like this and found no 4x4, checked and there was no front drive shaft, after they install the driveshaft this wheel bearing noise shows up, I found the left f...
2013 Chevrolet Volt 1.4L HV Isolation faults. VIN: 1G1RD6E43D
Initially customer says he was driving in a parking lot and noticed the ICE was running and sounded louder than normal (still showed 13 miles of EV range). Then the customer described hearing a loud noise that sounded like he ran over a cinder block. he go...

Fixes & Summaries for GM
Fix/Summary Answers
2007 GMC Sierra 2500 HD SLE 6.0L Mode Door operation VIN: 1GTHC24K17
OK, thanks to you guys for your valuable input. The problem was a pencil lodged down into the vent in the defrost flapper valve. We disassembled the upper dash plate and fished it out. This valve has a guide pin that fits into the into the actuator mode motor ...
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