Just wanted to see if anyone has had this happen to them yet. My 2003 2500 HO with 48RE just started to do something funny tonight on the highway. This happens at any speed, light or heavy throttle. While just using the throttle to keep the truck at speed, the engine drops to idle instantly, almost like the truck just shuts off, but it returns to idle. I was thinking APPS, but then noticed that every time this happened, the square indicator on the D, 2, or 1 (whatever the shifter was selected into) would blink or just turn off all together, kind of like when you're in between gears, which is making me think it's the PRNDL/neutral safety switch intermittently dropping out. I have no codes whatsoever, and no check engine light. What does everyone think?
Last edited: