Hesitant acceleration

[kurto_15]

I have a 2015 Silverado 2500hd with the 6.0 in it. A few weeks ago it started acting a little sluggish. When I would go to accelerate it would act like I’m pulling a heavy trailer and take forever to get up to speed and even shutter sometimes even though I wasn’t actually towing anything. I checked all the brakes and none of them were hanging up. I changed the air filter and my problem went away until today. I don’t drive the truck every day and will sit for a week or more at a time. Today after it started doing it again I checked  the brakes and air filter again and nothing. The truck shows no codes.

Any ideas?

[rlcole321]

First thing to try is to clear memory, disconnect the batt. for at least 3 hours (overnight works too), and then try again, if it comes back right away then check fuel system, pressure, possible water in the fuel.

[kurto_15]

I drove the truck the next day and it had no problems. I changed the oil, trans fluid and rear diff fluid and none were low and all looked fine. 
 

I can’t imagine it’s a fuel issue because the engine sounds strong when it’s accelerating. The rpms climb up high but the speedometer doesn’t move very fast. It’s like something is holding it back

[rlcole321]

"The rpms climb up high but the speedometer doesn’t move very fast. It’s like something is holding it back"

if the engine rev's but slow at moving, sounds like the torque converter is "Slipping"