Thought I was having misfire issues the way truck was acting. Replaced MAF, plugs, wires and coils. Intermittently at stop light you can go to accelerate truck and even with full pedal it takes a minute for something to decide to work right and go from doggy to right on. Noticed yesterday with mechanic riding with me that when traction control is turned off at dash the truck does not have same problem but can tell at times still feel something not quite right but dont want to start replacing Speed sensors, ABS and or traction control computer until I hopefully know for sure. No codes or lights being set either and did have windshield replaced in that time because previous install was bad and water was leaking into dash area on driver side so not sure if that could be it
How long has your 2006 GMC Yukon XL 2500 had this problem?
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I would not recommend changing out any speed sensors or related ABS system components unless you were able to perform testing that confirmed failure of those components. A diagnostic tool capable of reading and analyzing chassis data is needed if you want to look at this.
I would stick with engine performance, however. As far as the windshield replacement and water leaking, if water has breached a fuse box or the PCM, it can cause problems. This would require physical inspection, but in the case of the PCM would certainly give you some trouble codes if this was a problem.
It really sounds more like an air intake problem than anything else, like even an air restriction, like an improper air filter being used or some kind of other restriction. Leading to the intermittent nature of the concern, if it's an item that moves around and is not restrictive at times, it could lead to proper operation sometimes, and faults others. Another thing to consider: exhaust restriction. Especially if you had a misfire causing unburned fuel to enter the exhaust, you could have some kind of restriction due to loose or damaged internal catalytic converter components. Worth isolating to check. Good luck.
