About 2 weeks ago my '07 Tahoe LTZ (95000+ Miles) experienced the same issue. The Situation (along with a fist pump): - Driving along normally, not doing anything out of the ordinary, when the engine begins with a short RPM increase, followed by a quick decrease of about 1,000 RPMs, followed by the following warning indications in this order in about 3 second intervals: Stabilitrak Disabled, Traction Control Disabled, Service Stabilitrak, Reduced Engine Power, Engine shook like a '57 Chevy. The engine then stalls out. It is was triggered by a sudden stop or decrease in speed. I took a video of the error the third time that it occurred will try to post. Shop Trips: 1) Tune Up, 30-Point Inspection, Software Update; etc. - 7 Days Later SOS 2) Replace Sensors - Next Day SOS 3) Replace Throttle Body - Picking it up today so we will see - Keeping my fingers crossed!