March 1: GM Engine Failure Class Action Lawsuit Begins news | 1 days ago
February 28: GM Lifter Lawsuit Update: Motion to Sever Denied news | 2 days ago
February 21: GM Brake Booster Vacuum Pump Failures Cause Lawsuit news | 9 days ago
February 21: Recall: GM Rear Wheels Lockup While Driving recalls | 9 days ago
January 19: GM Engine Failure Recall Investigation Opened investigations | 42 days ago
GMC TSB #PIT6120
2023 GMC Sierra 1500
TSB Document:
Affected Component: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
- Summary
- This Preliminary information communicates information to direct to GM Upfitter bulletin 193 for installation instructions for the 9L7 Upfitter Switches.
Click a tab for more information.




