Trouble codes im getting all these codes 2002 Chevrolet Silverado trouble codes p0758 p0740pd p0753 pd p758 pd p0785 pd p1860 pd ive changed ignition switch alternater intake manifold transmission flush new gasket and tranny filter still getting codes

the codes are OBDll and are available on line free.
Example P0740 The diagnostic trouble code or DTC P0740 stands for "Torque Converter Clutch Solenoid Circuit/Open Circuit Malfunction.
P0753 The P0753 code indicates that the shift solenoid in transmission shift solenoid A, which changes the gears based off commands from the power train control module



all codes are transmission related.

codes are OBDll and are available on line free you have seious transmission problems. Code scanner came with manual with codes in it.
https://obd2-codes.co/
https://www.obdadvisor.com/most-popular-obd2-codes/


https://www.obdadvisor.com/most-popular-obd2-codes/
https://www.yourmechanic.com/article/p0421-obd-ii-trouble-code-torque-converter-clutch-circuit-malfunction-by-andrew-quinn

https://www.yourmechanic.com/article/p0785-obd-ii-trouble-code-shift-timing-solenoid-malfunction-3-2-shift-solenoid-circuit-electrical-by-valerie-johnston

https://www.transmissionrepaircostguide.com/p1860/

https://www.yourmechanic.com/article/p0753-obd-ii-trouble-code-shift-solenoid-a-electrical-1-2-shift-solenoid-circuit-electrical-by-valerie-johnston

https://www.yourmechanic.com/article/p0758-obd-ii-trouble-code-shift-solenoid-b-electrical-2-3-shift-solenoid-circuit-electrical-by-yourmechanic

You will have to pull the transmission fluid pan off and change the automatic transmission shift solenoids change both 1-2 and 2-3 shift solenoids you also need to change out the torque converter clutch solenoid. it is spring-loaded watch the shift valve when changing the tcc solenoid and pull your dipstick out before putting the pan back on makes it easier make sure to reset codes on the computer after you are done.

I think you have no power to transmission on terminal E
pink wire because it a common problems fuse trans 10amp blown or wire pink cut
hope it helps

those are all codes for the shift solenoids in the transmission. very easy to get at.

Trouble Code: P1870

Transaxle Component Slipping (4T60-E)

Trouble Code Conditions: DTC P0502, P0503, P0740, P0753, P0758, P0785 and P1860 not set, engine started, vehicle driven to a speed of 30-82 at an engine speed of 1000-3000 rpm, Fuel Shutoff inactive, TP angle from 8-35%, commanded gear not in 1st gear and the gear range is D4, TF

p0758 is- shift solinoid B curcuit electrical, TCC pressure control solinoid CKT open,its a possibility that the ignition switch is failing! it shares the same curcuit. the code does not pinpoint the problem it just tells which curcuit its in. so testing is needed to verify problem. GOOD-DAY!

P0717 - Input/Turbine Speed Sensor Circuit No Signal.

Try to find with your dealer this Bulletin Number: 20730022:
Bulletin Date: 20031001
Category: 980000 OTHER
Summary: SERVICE ENGINE SOON LIGHT ON WITH DIAGNOSTIC TROUBLE CODES P0716 AND / OR P0717, P0730, P0753, P0758, P1860, P1887 OR OTHER MISCELLANEOUS TRANSMISSION TROUBLE CODES SET. *TT

Good luck.

PO740 IS TCC SOLENOID CIRCUIT MALFUNCTION CONDITIONS.CHECK TRANSMISSION FUSE - PO753 IS A/T 1-2 SHIFT SOLENOID CIRCUIT MALFUNCTION CONDITIONS.THE 1-2 SHIFT SOLENOID HAS FAILED - PO 758 IS A/T 2 -3 SHIFT SOLENOID CIRCUIT CONDITIONS. CHECK THE ERLS FUSE - PO1860 IS TCM PWM SOLENOID CIRCUIT MALFUNCTION CONDITIONS.CHECK TRANSMISSION FUSE+ IGNITION FUSE.

Here's the information on your trouble codes (which explains the problem you're having).

P0740 Torque Converter Clutch Circuit Malfunction
P0753 Shift Solenoid A Electrical
P0758 Shift Solenoid B Electrical
P0785 Shift/Timing Solenoid Malfunction
P1860 TCC PWM Solenoid circuit electrical

The good news is that it is an electrical problem rather than a mechanical problem. So, you should be able to get the problem taken care of without removing the transmission. The bad news is, you'll probably have to take it to a tranny shop to get the electrical bug worked out (unless you have the knowledge/equipment to test each of the electronic components of the tranny).

Hope this helps and good luck!