I got a code of p0069,p0284,po299

Www.cruzetalk.com has numerous posts regarding this code and several different things go that may solve the problem.

Please go to the link for detailed info on this fault code. P0069 Manifold absolute pressure MAP sensor barometric pressure BARO...

bad need of a tuneup? like new spark plugs, ?
172 , is 02 rich/ lean warning. this one is low oxy for rich.
this code can just be a victim. for sure , with misfire.
means 02 sensor stuck at rich,
what is water temp in engine coolant, at failure? less than 150F?
could be lots of things.
leaking injectors, bad fuel.
injector sticking> causing misfire.
id use a scan tool and watch all sensor when it fails.
too high fuel pressure.
misfires cold, but only luke warm cold starts not fully cold.

just one DTC, no P0300 or 30x misfire codes, not even P0300 pendings?

that is a 12vdc power problem.
the sensors are failing , many do to lost power. (12vdc electrical distribution power)
so use a voltemeter, i bet even at he cig lighter port the voltage drops
below 13.3v running, way below. infact.
are your battery terminals clean,
is the rested voltage at the battery terms 12.6v (keys in pocket)
no? then the battery is being discharged,

P0284
Cylinder 8 Contribution/Balance Fault

Your fault on #8 may be the injector itself, or it may be low compression on that cylinder caused by valves, rings, etc.

code#2146 fuel injector group a supply voltage ckt (open) code# po299 turbo/supercharger (underboost) code# po483 control fan rationality check (malfunction) code# po513 immobilizer (incorrect)

When was the last time you had transmission oil changed and the tranny pan removed and the tranny filter changed? If never, this is your starting point.

The problem with these vans is that the tranny pan is at about a 20 degree angle under the transmission near the driver front tire. The problem with this design is that these pans eventually begin to leak at the lowest point of the pan, and over time you will not notice the ATF loss. Most likely your ATF level or cleanliness/viscosity may be bad.
Don't cry 'TRANSMISSION' until you get your tranny serviced (ATf oilc change, new tranny filter, clean magnets, clean pan, clean tranny).

If you want to check the codes, here is a helpful link. Enjoy.http://autorepair.about.com/library/ts/obd-i/bl-dtcs-55a.htm?once=true&

If you have the capability to lift your tires using you cars jack try to rotate all tires at a time. make sure you have not engage to any gear anghand barke off and make sureto put a safety block on the opposite tire you are lifting. if you have hard time to rotating your tire wich is lifted and on nuetral positon your brakes are stuck. Have a good mechanic check it for you