SierraFox

Everything is working other than being able to clear P0719. Despite having new switches installed and testing against known good ones. Doesn't really seem like anyone has an answer or solution other than replace it. The LED bulb in the dome light was making the dash do weird things. So I removed it and now its fine

Another update, mostly doing this just incase anyone runs into similar problems and they may find the info helpful. Moved the grounds I had attached to the bell housing back to their rightful homes on top of the block itself. This has cleared all but one code. The P0719 code for the brake light switch. It's new with GM part. I also tested it with a known good one from my other truck. Was just inspecting wires when I came across a relay inside the little box of wires beside the brake pedal. The relay was burning hot. The label says intadv pwr. Still no 4x4 lights after the truck starts, no radio and no cruise control but that's probably the brake light switch

Thank you for the info! Great source. So an update. I reflowed the solder on the EBCM. It solved a lot of issues but I'm left with just PCM codes now. Research is leaning me towards the tcc solenoid or the harness inside the transmission. Here is what codes I have left. P0719 P1631 P0741 P1626 U1056 U1300 U1301

Hey guys. Im new to the forum but I've been doing research on this for days. Im wondering if I have a bad ground somewhere? Despite checking them all they seem fine. The back story. Bought a used 01 gmc 2500 with a blown motor. Replaced it with new gaskets and everything. Has new sensors such as oil pressure, cam position, iac, tps, egr valve. It was having a very low idle which I resolved with the parts mentioned and a TB cleaning. Idles between 550 and 600 when warm in park. I can't seem to get my TC to lock up after 4th. Trans fluid was low when purchased. 3 quarts was needed and its still just a touch dark. Seems to shift okay otherwise. Gives a little 4th gear flare sometimes. I've got these 2 codes after fixing a lot of stuff. P0741 and P0719 I have replaced the brake light switch with new. Also tested it out with the one from my working 01 silverado. It doesn't change anything. I've also got some ABS issues and BCM issues. Codes: C0241, C0246, C0265, C0237, C0251, C0251, C0281, C0236, C0225 It suggests replacing ABS hydraulic control assembly and electrical ground repair. A little at a loss right now. The one thing I can think of is the grounds from the main engine harness are currently grounded to the bellhousing bolts. Is that the issue. Instead of directly to the block itself? New BCM? Soldering reflow work on it? Any direction or insight is highly appreciated