2004 Silverado
4.8/4L60E
Bone Stock
As stated when trying to powerbrake the truck will not go above 650 rpm when trying to powerbrake it. It acts like a traction assist system is activating very similar to what a pontiac solstice does if you've ever driven on of those. Ive never seen a gen 3 truck do this before. There is no traction assist button in the truck to turn off but even if there was I wouldn't think it it would hold the truck back this bad. Its throwing no ses lights but it literately will not get out of the way of itself until it hits about 20 mph then it will start to pull but by that time my dads Caravan would have put 4 lengths on it. lol
Anyone have any ideals?
Attaching a scan an the stock tune. Nothing special in there I've found