Fix Starter problems
Some GM vehicles may appear to have starter motor problems with their computer controlled “bump start” systems. When you turn the ignition key to start in vehicle equipped with this system, the computer immediately takes over the starter cranking operation. The computer determines when to release the starter, not the driver. The system was designed to prevent starter gear and flywheel damage if the starter is engaged while while the engine is running
The following vehicles have the bump-start system:
2007-2013 Cadillac Escalade, Chevy Avalanche, Silverado, Suburban and Tahoe and GMC Sierra and Yukon
Some owners complain that the system isn’t working sometimes. But GM reports that the bump start feature is designed to automatically disable if it detects a Low Fuel warning lamp is on and/or the FUEL LEVEL LOW message on the driver information center.
If either of these lights are on and the bump start isn’t working, this is considered normal operation. Once you fill with gas, the system will resume normal operation.
You need a professional shop manual to work on a late model vehicle. And you need access to the latest technical service bulletins so you don’t waste time and money replacing parts that may misbehave due to a manufacturer’s software glitch. Forget about those cheap manuals you find at the auto parts store. They will just lead you astray. Here are the two best online shop manuals around.
©, 2014 Rick Muscoplat
Posted on by Rick Muscoplat