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2009 Sierra Low Engine Pressure problem with Active Fuel Management
12 messages, Last post on Feb 18, 2012 at 5:27 AM
You are in the Chevrolet Silverado & GMC Sierra Forum.- Your Host is kcram
What is this discussion about? Chevrolet Silverado 1500, GMC Sierra 1500, Fuel System, Truck
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#10 of 12 Re: 2009 Sierra 5.3 liter engine knock [turbo122] by gmcustsvcsarah
Jan 19, 2012 (12:41 pm)
Replying to: turbo122 (Jan 19, 2012 11:06 am)
Understandable. If you decide to go back, or ever need help, we're here! I hope you have many more happy miles with your truck, Sarah
GM Customer Service
#11 of 12 Re: 2009 Sierra 5.3 liter engine knock [turbo122] by ceb66
Jan 19, 2012 (3:16 pm)
Replying to: turbo122 (Jan 19, 2012 8:50 am)
Hi turbo, My 2011 knocks/taps in the morning. It doesn't matter what the weather is. It's knocked since brand new.
Not sure, but mine is probably a hydraulic lifter noise.
I've got so many other issues with the truck, GM doesn't want to hear about the " engine knock " so many are complaining about.
#12 of 12 Re: 2009 Sierra 5.3 liter engine knock [turbo122] by konders
Feb 18, 2012 (5:27 am)
Replying to: turbo122 (Jan 19, 2012 8:50 am)
My father has a 2010 with the 5.3, got a knock in engine. The dealership changed a small belt, then a idler wheel and belt then put engine treatment in and noise still there. They now found out there is "pitting" on the crankshaft journals, replaced under warranty and all good now. The dealership informed him that this is a issue effecting some trucks in Canada and the USA.
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