cooperthetrooper

2003 silverado ss

transmission will only shift 2-3 manually

following codes

p0740 torque converter clutch solenoid circuit
p0753 shift solenoid a electrical
p0758 sift solenoid b electrical
p0785 shift timing solenoid circuit
p1860 tcc pwm solenoid circuit
p1638 generator f terminal circuit

checked all connections on harness and fuses

please help!!!!

firebladeJJ

iTrader: (1)

when the truck starts does the HVAC blower work?

cooperthetrooper

yes sir, it blows cold no issues

firebladeJJ

iTrader: (1)

oh, I had the same issues with my truck one day but it was sporadic also the truck wouldnt start either. when it would start I had all those same codes. it ended up being a loose connection to one of the ignition relays under the fuse box in the engine bay.

cooperthetrooper

I will try that when i get home

cooperthetrooper

transmission was fine codes came up then got a tune cleared all the codes transmission good for about 100 miles now they wont clear out

firebladeJJ

iTrader: (1)

Uh I'd take that thing back to the tuner and say wtf! Its probably something simple. Who did the tune for you and what mods do you have?

cooperthetrooper

They were doing it before the tune figured the tune would fix the problems it did the first tune for about a day now second tune as soon as they clear them pop right back up....

cooperthetrooper

Mods are cold air intake can tbss intake manifold swap

darkirish63

iTrader: (5)

Check the ignition switch on the left side of the steering column. AC Delco part # D1426D. This $24 part failed on me once and I never knew it was responsible for sending proper voltage to the transmission controlling shift timing. Worth a shot.

https://www.partsgeek.com/k3l6y99-chevrolet-silverado-1500-ignition-switch.html