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Stutter Feeling When Cruise And Ac Is On

KyRob

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KyRob Enthusiast

KyRob

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Anyones truck seem to stutter when the AC and cruise control are on at the same time? This is especially noticeable when going down a hill. I sometimes notice it when just the cruise is on but not as bad as when the ac is on also. Also, when AC is on, trans seems to shift harder going into first. Is it me being overcritical of my first GMC or does others notice this? I am taking it to dealer Monday to let them drive it so maybe it is a little something that can be fixed.

 

Rob

KyRob Enthusiast

KyRob

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It's an 04 and I think it was built in Canada. Not sure why I think that but I saw it on some paperwork or something. Any negatives depending on where they were built?

 

I was out in the truck earlier today and sometimes it would shift through the gears smooth as butter. Next take off was jerk,clunk,jerk. Can't put my finger on when or why it will shift smooth it just does it's own thing. I am 90% of the time under 2000 rpm when driving this truck also. Like the mpg better when I drive this way. Only time I really get into it is a have to case. Warranty is up in about 20 days and I am wondering if I'll be like some of you guys and get 100 K with no problems or will I be picking up a tranny on July 8.

 

Rob

jdolotina Enthusiast

jdolotina

Posted
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I had an 04 Silverado with the same stutter feel with the cruise on. I didn't think of it as a big deal. I eventually put dual exhaust on the truck and that got rid of that problem. I don't know if it might be a back pressure issue or what, but hey I got a little extra ponies, nice sound, and no stutter while the cruise was on. I use to travel a lot between Shreveport and Dallas(183 miles). I noticed a huge difference with the new exhaust system.

 

As far as your transmission goes. I know when you first start them up they will shift a little hard to help warm up the trans. Once it reaches a certain temp it will shift smoother. Now if you get into it; the truck is going to notice the pedal response and raise your line pressure to make the trans shift harder. However, if it is doin it while your granning the truck I guess you might have an issue. Somethings you could look at is maybe a custom tune. These guys can mess with shift firmness and softness and get it right for your liking. I hope I am some help to you and if anybody else feels the need to add or correct me please feel free.

 

Josh :cheers:

redvett Senior Enthusiast

redvett

Posted
Posted

2003 & up GMT800 trucks came with throttle by wire and if your feeling the stutter going down hills its normal. When the electronic throttle was introduced it allowed GM to remove the EGR and control NOX with throttle opening on deceleration.

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