08VMAXZ71

My brother has had the same code on his 05 5.3 with a stock 4l60e. So the may just need to clean the filter? I might do that on his truck soon. I

The code always shows up when he's just cruising down the road.

LARRY01Z28

iTrader: (28)

I know this is a very old thread. But 06 sierra5.3 what fixed your truck?

my truck is doing the exact same thing.

Wolftrk99

iTrader: (5)

Does yours have a harsh 1-2 shift??? P0894 is an updated p1870 and theres a bulletin on it about replacing the valve body..... I will see if i can find it tomorrow

Wolftrk99

iTrader: (5)

4L60E GM Bulletin TSB # 01-07-30-023A DTC P1870 at trutechtrans.com

Found this, its an older version but result is the same ill find the updates version tomorrow...

LARRY01Z28

iTrader: (28)

thanks wolftrk99. I see your from va beach. I was stationed at Norfolk for about 7 years off and on. thanks for the help.

Wolftrk99

iTrader: (5)

No problem.... ive been here for About 15 years now and if i could bear being that far away from my kids, id probably be somewhere else..like back in northern VA... Lol cant blame ya for not aticking around this area!!!

LARRY01Z28

iTrader: (28)

well wanted to give an update. I had a bad TQ converter that was causing my P0894 code.