GM OBD1 code 12? It means your engine's RPM signal isn’t detected during cranking. Common causes include a faulty crankshaft position sensor, defective wiring, or a malfunctioning ignition module. Haynes Manuals helps you diagnose and fix the problem step by step. Find your GM manual today at haynes.com. #HaynesManuals #HaynesShowsYouHow #GMRepair | Haynes Manuals

Here are the top problems for the Chevy Silverado 2500 Truck. In this video, Andy discusses the common problems you might encounter with this generation of the Silverado 2500. He also shares tips on how you can resolve the problems yourself. Check out more videos on our YouTube Channel: http://1aau.to/m/youtube Shop High Quality Parts: http://1aau.to/m/ShopParts | 1A Auto Parts