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Check the fuel pressure under a load first, if it is ok then try unplugging the Mass airflow sensor (MAF), if the engine runs ok (check engine light will come on) then the MAF is most likely defective.
P1192 has to do with Intake Air Temp. That sensor might be bad. The P0700 has to do with Transmission Control. Whether it's the control module or something else is hard to say at this point. However, if the vibration is really in the front of the vehicle, I would start by checking UJoints on the front drive shaft, CV Joints and the Transmission Mount/Motor Mounts. Make sure your transmission fluid level is correct. The shaking "under a load" is likely a torque converter issue. I had the same problem on my 96 Suburban. Instead of rebuilding the transmission (or changing the torque converter), there is a product available called "Dr. Tranny Shudder Fixx". Small tube, put in with Transmission Fluid, shudder goes away almost instantly. Hope this helps.
The fuel pump will still be working after the engine starts as it is required to produce fuel pressure for the engine to run under all load conditions. How hard it runs is determined by the load and rpms. If the regulator is faulty there will be problems with starting and performance. However it would be advisable to have a pressure test done on the fuel manifold to check the pump, regulator and filters
Could be fuel or ignition. If the coil or ignition is weak, you may not have enough power to fire the plugs under load. And if the fuel pressure is low, you may not have enough fuel under load.
In reality, the gearbox was never designed for power shifting. Time is lost in trying to do a power shift with the tranny not willing to cooperate. Give yourself a break and use the clutch. It beats a missed shift every time.
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