Replaced steering column on 2000 grand cherokee with LKQ which had a key,it starts but shuts down in a few seconds

SOURCE: 1996 Jeep Grand Cherokee - Will Not Start or Run

ok it has nothing to do with the gear box
no ower to your injectors check engine fuse
if and wen u took the gear box out did take the positive lead off?
if u did unplug the computer or try the reset so the computer can no the car is back togeather

SOURCE: 2001 jeep grand cherokee overheating

is the radiator fan coming on and staying on, or not coming on at all?? i was having the same problem, and it turned out to be a fan relay switch which was pretty easy to replace. around 40 bucks, and maybe 30-45 mins.

SOURCE: replace ignition in steering column 92 jeep laredo

dealer has better picture they can print out for you give them a call

SOURCE: 99 Jeep grand cherokee steering column makes a clunking

power steering pump might need more oil (whining noise). generally power steer pumps take automatic transmission fluid. there should be a reservoir above the pump only fill this a little bit then start the car and turn left to right and recheck level. fluid should only be low if there is a leak at power steer pump/lines or steering rack,

SOURCE: Steering column diagram needed for 1989 Jeep Cherokee

If you intend to keep the vehicle long term, I would suggest you invest in a Haynes Manual, That is worth its weight in gold, for this and any other project..
Regards,DT