Slight Vibration When Letting Off Accelerator

[jzinckgra]

I've only got 2700 miles or so on my 5.3 , but i notice in the morining when the truck isn't completely warmed up, when I go to let my foot off the pedal there is this noise/vibration. This usually happens around 35mph when just feathering the throttle then releasing. It almost feels like a driveline vibration. Every once in awhile I'll notice after the truck s warmed up too. Is this normal? The vibration lasts ~2sec.

[nickvrebel]

change the DIC display to instant economy and see if it correlates with the change between V8 and V4 modes.

[jdubub]

change the DIC display to instant economy and see if it correlates with the change between V8 and V4 modes.

 

 

+1

[jzinckgra]

change the DIC display to instant economy and see if it correlates with the change between V8 and V4 modes.

 

will check that out in the morning. thanks.

[jzinckgra]

yep, noticed the vibration happens when switching between V4 and V8 modes. Seems more noticeable now then when the truck was new. Does everyone else feel this switch between cylinder #?

[nickvrebel]

you will feel a slight vibration as it transitions, it's just one of those things.... all of a sudden the vehicle is running on 1/2 the horsepower that it had, it's gonna blip a hair during the transition. I bought my truck "new" as a former demo model with 8,000 miles on it so I can't comment on any quirks before that mileage, but I know that now with 20,000 miles I can still barely detect the change without looking. It's not extremely noticeable, the roads are rough enough around here that I have other things to worry about before this.