Once wired to the PCM the A/C compressor wire is not needed , it is a 12v positive wire anyways (green/white) , light green key on positive A/C if I remember right .
Once wired to the PCM the A/C compressor wire is not needed , it is a 12v positive wire anyways (green/white) , light green key on positive A/C if I remember right .
2005 1500 HD , Custom OS3 SD tune .
2006 Trailblazer
Dinosaurs and Plants gave their lives so that we may drive , long live fossil fuel .
Ok Im going to check for that OS...I have an 01 PCM though from a suburban 2500Originally Posted by GAMEOVER
Ok so I tried the OS you mentioned but it wont let me write it to the PCM am I missing something?!? It says that it has to match the current OS that the PCM has.
Ok, update, ran that OS with Full Flash and still had the exact same issue. Damn this really blows, Im pretty sure theres a short somewhere then. Anyone know of a wiring diagram i can try to follow so i can see how HVAC communicates with the PCM!? When that old harness blew out and i got those codes i think something electrical went with it. I just need to find out what and where it is. Seeing that U1500 can either be HVAC code OR onstar im going to assume that HVAC is the issue since i doubt onstar would kick my fans on lol
Actually, does anyone know if the BCM has anything to do with this??? Being that i got B1000 DTC and U1500??
01 Silverado ECSB:
6.2L 383 Stroker IB (6.125 Rods, 4" Lunati Forged Crank, 3.903 Bore -30 cc Lunati Forged Pistons, 222/219 .550 .547 116LSA Reverse split cam, double roller timing chain, hydraulic roller lifters, TEA port n polished heads, 7.400" Pushrods, ARP Bolts everywhere), 65lbs Injectors, ASP Underdrive pulley, 160* TStat, Dynatech LT's w/ Catted Y, Gibson cat back, K&N Cold Air intake, Flex a Lite Fans, 34" radiator, EFiLive Tune
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