GMC Sierra: Stuck On Defrost

In this video I have a look at an older GMC Sierra that had a customer complaint of the HVAC being stuck on defrost. My gut told me "prolly just a bad actuator." However, the data showed us something different.

Intermediate - 32 min - Green Energy & Auto - South Main Auto Repair

The full course: Learn Car Repair & Maintenance free

What you'll need

• Mechanic tool set: Sockets, ratchets and wrenches.
• OBD2 scanner: Read check-engine codes.
• Hydraulic floor jack: Lift safely.
• Jack stands: Never work under a car on a jack alone.
• Torque wrench: Wheels and engine bolts done right.

Books

1. Auto Repair For Dummies by Deanna Sclar - View on Amazon
2. How Cars Work by Tom Newton - View on Amazon
3. Automotive Technology by Jack Erjavec - View on Amazon

Next lessons

• Do Head Gasket Sealers Actually Work (FULL 2yr TEST with Engine Teardown) (31 min, ChrisFix, Intermediate)
• How Much Weight can you REMOVE from your Car? (Weight Reduction) (27 min, ChrisFix, Intermediate)
• How to Buy a Budget Friendly Project Car (22 min, ChrisFix, Intermediate)
• How to Finish Your Abandoned Project Car (Turbo Del Sol) (31 min, ChrisFix, Intermediate)
• How to Fix a FREE CAR that Cranks but Won't Start (16 min, ChrisFix, Intermediate)
• How to Fix a Sloppy Shifter and Leaking Transmission (33 min, ChrisFix, Intermediate)
• How to PERFECTLY Maintain your First Car (57 min, ChrisFix, Intermediate)
• How to Remove Spray Paint from a VANDALIZED Car (27 min, ChrisFix, Intermediate)