How can I tell if my transmission solenoid is bad?
How can I tell if my transmission solenoid is bad? To read the trouble codes from the transmission control module, you need an OBD2 scanner to read generic and enhanced trouble codes. Most cheaper ones can only read the codes from the engine control module. If the transmission control unit recognizes any shift solenoid problems, it may cause the transmission to shift very slowly. How to test shift solenoids on GM 4.3L? In this article, I'll show you how to test the transmission shift solenoids (specifically 1-2 solenoid and 2-3 solenoid) on your GM 4.3L, 5.0L, 5.7L pick up, van,...