I was originally thinking fuel pump, but your description that the brakes lock up when it stalls is beyond anything I have experience in. When you say the steering wheel locks up, I suspect you are just losing power steering since the engine is stalled, making the steering wheel difficult to turn, but not locking it. The only way for the steering wheel to lock is to turn the key to the off position.
When you say the brakes lock up, do you mean it is difficult to push the brake in order to stop the truck, or do you mean the truck comes to a screeching abrupt stop when the engine stalls?
2001 Bonneville SSEi (retired at 365,000 Kms.)
2014 Jeep Grand Cherokee Overland (yes, I know its not a GM)