For diesel engines, the wait-to-start light shows that the engine is functioning properly and indicates when the engine can be started.
The fast warm-up glow plug system makes the wait-to-start light stay on for a shorter amount of time than most diesel engines.
For more information, see Starting the Engine.
#99-04-20-002H: Information on Driveline Clunk Noise - (Apr 11, 2013)
Subject:Information on Driveline Clunk NoiseModels: 2014 and Prior GM Passenger Cars and Light Duty Trucks This bulletin is being revised to add the 2013-2014 model years. Please discard CorporateBulletin Number-99-04-20-002G (Section 04 – Driveline/Axle).Important:The condition described in ...