Replaced broken power steering pump, Now "Service Brake System&#34

[patriotplumber]

Just replaced the power steering pump for second time in a month on a 04' 3500 dually 8.1l Allison trans. Test drove after bleeding etc, everything was fine. Parked it. An hour later get in to go somewhere, within a mile "Service Brake System" ABS lights come on, as well as Check Engine symbol. Started to run a little funny, wouldnt shift to 3rd. I pull over, check everything I did, is fine. Start back home, only light on is engine light. Disconnect battery for a few mins, Reconnect, all 3 lights back on. Feels like tranny is stuck in 2nd, or slipping on take off.

 

I am at a loss, what in the hell can be wrong now??? 150k miles, has been maintained well. Trans hasnt been serviced since 75k. has fluid and looks clean.

 

Any help please?

Thanks everyone

[gmtech4]

you have a code to get diagnosed ,the transmission is defaulting to get your attn,

 

so take it in,its electrical and you cant fix it ,sry

[patriotplumber]

Got DTC codes P0102, Mass airflow sensor. P0700 Allison Trans. P0721 Allison trans. I had removed the TCM to get easier access to pump, Im gonna reinstall it, make sure connections are good. The MAF, I have a K&N filter and recharged it about 2-3 weeks ago. Probably oiled up. Gonna try cleaning it, I had to do that before a few yrs ago.

[patriotplumber]

I took TCM back out, and looked like a little moisture got on the bottom connector. Dried it off, put little dielectric grease on gasket, back in. The MAF sensor, cleaned it with MAF spray, good to go. Its been 2 days, about 150 miles and everything is working fine.

Thank the lord, I cant afford my truck to be down!! Thats why I bought Chevrolet.