1997 c1500 tranny stuck in 3rd gear

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ben

1997 c1500 tranny stuck in 3rd gear

Unread post by ben » Tue Dec 07, 2010 1:56 pm

Hi I have 97 c1500 v8 5.7 I think it's tbi the trottle body faces up.My question is in the morning my truck runs fine once it's warm it bucks from 2nd gear and is stuck in 3rd, auto zone said p0785 being 3_2nd shift solenoid, so I replaced a,b tcc and 3_2 shift solenoids. The tranny shifted fine for about 5 miles then the ses light came back on and it bucks again. Now I'm lost, people tell me the ignition harness is to blame I'm not sure, did I mention I also lose 1gear and overdrive once engine warm which is about 2 miles drive and truck won't rev over 2000 rpm even if floored on take off,did full tune up,oh and tranny does not slip if I disconnect the battery for 5 min.It only bucks once ses light comes on, all gauges work fine (VE139248) are the last 4 numbers of the vin, any help is greatly appreciated. Thank you in advance.