My 2007 Burb was taking to dealer, due to when I turn the key & release, the truck continues to do a long crank before starting. Dealer of course couldn't figure it out and said fuel pressure was fine. Any suggestions??

 

It sounds like the fuel pressure is leaking down when you turn it off. When you experience extended cranking, just leave the key in the on position for a few seconds. That will give the fuel pump time to build pressure, then it should start normally. There is a check valve in the fuel pump that keeps the fuel line pressurized. If the check valve goes bad you can replace the pump, or if you don't want to drop the tank, you can install a check valve in the fuel line as close to the tank as you can get. I installed a check valve on the frame rail just above the rear axle, works perfectly now.

 

Thanks RichC10 for your help!!! That's exactly what I've been doing. Turning the key twice before starting and it cranks right up. I've looked into the check vavles you recommended,do I need rubber couplings to install it as well? Thanks again for the relief!!!!

 

Please don't buy a check valve because this year doesn't have a return fuel line!!! Instead go to RockAuto and buy 2 injectors for $35. We found 2 leaky injectors, replaced them in 15 min and truck runs fine!!! The Chevy dealer nor another shop could figure out the problem!! Go figure!!!

 

good find and fix.

unfortunately the truck went to the wrong tech at the dealership or the tech got the wrong information from the service writer. gm has a service tool that will allow the tech to block off fuel returning to the tank and an active fuel injector tester that measures injector leakdown. both of these tools would have easily identified this problem.

 

My 2010 Tahoe has the same problem but it's so random that it's impossible to have any idea of what could be causing it.

 

If it does it with a warm motor try giving it some throttle when cranking. Possible seeping injector will put too much fuel into motor making a long crank and giving at least 1/2 throttle will make it easier starting. Cold motor likes extra fuel so it's not noticeable. Thats one way to quick diagnose that issue. My old '99 Yukon needed the spider injectors changed due to them seeping., no spider setup in a '10.