This is the pin out from the factory manual for 4.8, 5.3 and 6.0


Blue Connector

Pin
Wire Color
Circuit No.
Function

1
BLK/WHT
451
Ground

2
LT GRN
1867
12 Volt Reference

3
PNK/BLK
1746
Fuel Injector 3 Control

4
LT GRN/BLK
1745
Fuel Injector 2 Control

5-10
--
--
Not Used

11
LT BLU
1876
Knock Sensor 2 Signal

12
DK BLU/

WHT
1869
CKP Sensor Signal

13
ORN/BLK
463
Requested Torque Signal

14
ORN/BLK
1061
UART Serial Data

15
DK BLU/

WHT
774
UART Serial Data

16
-
-
Not Used

17
DK BLU
1225
Transmission Fluid Pressure Switch Signal B

18
RED
1226
Transmission Fluid Pressure Switch Signal C

19
PNK
439
Ignition 1 Voltage

20
ORN
440
Battery Positive Voltage

21
YEL/BLK
1868
Low Reference

22
--
--
Not Used

23
PPL
719
Low Reference

24
--
--
Not Used

25
TAN
1671
HO2S Low Signal - Bank 2 Sensor 2 (w/Case Grounded Sensor)

25
TAN
413
HO2S Low Signal - Bank 2 Sensor 2 (w/Isolated Grounded Sensor)

26
TAN
1667
HO2S Low Signal - Bank 2 Sensor 1 (w/Case Grounded Sensor)

26
TAN
413
HO2S Low Signal - Bank 2 Sensor 2 (w/Isolated Grounded Sensor)

27
--
--
Not Used

28
TAN/WHT
1669
HO2S Low Signal - Bank 1 Sensor 2 (w/Case Grounded Sensor)

28
TAN
413
HO2S Low Signal - Bank 2 Sensor 2 (w/Isolated Grounded Sensor)

29
TAN/WHT
1653
HO2S Low Signal - Bank 1 Sensor 1 (w/Case Grounded Sensor)

29
TAN
413
HO2S Low Signal - Bank 2 Sensor 2 (w/Isolated Grounded Sensor)

30
LT GRN
1478
Coolant Level Switch Signal

31
--
--
Not Used

32
BLK/WHT
771
Transmission Range Switch Signal A

33
PPL
420
TCC Brake Switch/Cruise Control Release Switch Signal

34
WHT
776
Transmission Range Switch Signal P

35
GRY
48
CPP Switch Signal

36
BLK
1744
Fuel Injector 1 Control

37
YEL/BLK
846
Fuel Injector 6 Control

38
PNK/WHT
1101
Damping Lift/Dive Signal

39
--
--
Not Used

40
BLK/WHT
451
Ground

41
BLK
407
Low Reference

41
GRY
720
Low Reference (w/Isolated Grounded Sensor)

42
--
--
Not Used

43
RED/BLK
877
Fuel Injector 7 Control

44
LT BLU/BLK
844
Fuel Injector 4 Control

45
GRY
474
5 Volt Reference

46
GRY
416
5 Volt Reference

47
GRY
597
5 Volt Reference

48
GRY
596
5 Volt Reference

49-50
--
--
Not Used

51
DK BLU
496
Knock Sensor 1 Signal

52
--
--
Not Used

53
BLK
470
Low Reference

54
BLK
452
Low Reference

55
BRN
1456
EGR Valve Position Signal

56
WHT
1579
Fuel Temperature/Composition Signal (w/L59)

57
ORN
440
Battery Positive Voltage

58
DK GRN
1049
PCM Class 2 Serial Data

59
YEL
710
Class 2 Serial Data

60
ORN/BLK
469
Low Reference

61
PNK/BLK
632
Low Reference

62
--
--
Not Used

63
GRY
720
Low Reference (Except w/isolated grounded HO2S)

63
TAN
413
HO2S Low Signal - Bank 2 Sensor 2 (w/Isolated Grounded Sensor)

64
--
--
Not Used

65
PPL
1670
HO2S High Signal - Bank 2 Sensor 2

66
PPL
1666
HO2S High Signal - Bank 2 Sensor 1

67
--
--
Not Used

68
PPL/WHT
1668
HO2S High Signal - Bank 1 Sensor 2

69
PPL/WHT
1665
HO2S High Signal - Bank 1 Sensor 1

70
BRN
1174
Oil Level Switch Signal

71
--
--
Not Used

72
YEL
772
Transmission Range Switch Signal B

73
BRN/WHT
633
CMP Sensor Signal

74
YEL
410
ECT Sensor Signal

75
PNK
1020
Off/Run/Crank Voltage

76
BLK/WHT
845
Fuel Injector 5 Control

77
DK BLU/

WHT
878
Fuel Injector 8 Control

78
--
--
Not Used

79
WHT
687
3-2 Shift Solenoid Valve Control

80
ORN/BLK
510
Low Reference

==========================================

Red Connector

Pin
Wire Color
Circuit No.
Function

1
BLK/WHT
451
Ground

2
BRN
418
TCC PWM Solenoid Valve Control

3
TAN
1465
Fuel Pump Relay Control - Secondary

4
--
--
Not Used

5
TAN/BLK
464
Delivered Torque Signal

6
RED/BLK
1228
PC Solenoid Valve High Control

7
RED
1676
EGR Valve Supply Voltage

8
LT BLU/WHT
1229
PC Solenoid Valve Low Control

9
DK GRN/

WHT
465
Fuel Pump Relay Control - Primary

10
WHT
121
Engine Speed Signal

11
DK BLU
604
A/C High Pressure Recirculation Switch Signal

12
--
--
Not Used

13
LT BLU/BLK
396
Cruise Control Engaged Signal

14
--
--
Not Used

15
BRN
25
Charge Indicator Control

16
GRY/BLK
1694
4WD Low Signal

17
DK GRN/

WHT
2523
A/C Request Signal

18
--
--
Not Used

19
BLK/WHT
1695
Axle Switch Signal

20
LT GRN/BLK
822
VSS Low Signal

21
PPL/WHT
821
VSS High Signal

22
RED/BLK
1230
AT ISS High Signal

23
DK BLU/

WHT
1231
AT ISS Low Signal

24
DK BLU
417
TP Sensor Signal

25
TAN
472
IAT Sensor Signal

26
PPL
2121
IC 1 Control

27
RED
2127
IC 7 Control

28
LT BLU/WHT
2126
IC 6 Control

29
DK GRN/

WHT
2124
IC 4 Control

30
--
--
Not Used

31
YEL
492
MAF Sensor Signal

32
LT GRN
432
MAP Sensor Signal

33
DK GRN
1614
Recirculation Door Control

34
DK GRN/

WHT
428
EVAP Canister Purge Solenoid Control

35
--
--
Not Used

36
BRN
436
AIR Pump Relay Control

37-38
--
--
Not Used

39
RED
631
12 Volt Reference

40
BLK/WHT
451
Ground

41
WHT
257
EGR Solenoid Control

42
TAN/BLK
422
TCC Solenoid Valve Control

43
DK GRN/

WHT
459
A/C Compressor Clutch Relay Control

44
--
--
Not Used

45
WHT
1310
EVAP Canister Vent Solenoid Control

46
BRN/WHT
419
MIL Control

47
YEL/BLK
1223
2-3 Shift Solenoid Valve Control

48
LT GRN
1222
1-2 Shift Solenoid Valve Control

49
YEL/BLK
1827
Vehicle Speed Signal

50
DK GRN/

WHT
817
Vehicle Speed Signal

51
YEL/BLK
1227
TFT Sensor Signal

52
GRY
23
Generator Field Duty Cycle Signal

53
--
--
Not Used

54
PPL
1589
Fuel Level Sensor Signal - Primary

55
DK GRN
603
A/C Low Pressure Switch Signal

56
--
--
Not Used

57
BLK
552
Low Reference

58-59
--
--
Not Used

60
BRN
2129
Low Reference

61
BRN/WHT
2130
Low Reference

62
GRY
773
Transmission Range Switch Signal C

63
PNK
1224
Transmission Fluid Pressure Switch Signal A

64
DK GRN
890
Fuel Tank Pressure Sensor Signal

65
--
--
Not Used

66
PPL/WHT
2128
IC 8 Control

67
RED/WHT
2122
IC 2 Control

68
DK GRN
2125
IC 5 Control

69
LT BLU
2123
IC 3 Control

70-72
--
--
Not Used

73
DK BLU
1936
Fuel Level Sensor Signal - Secondary

74
LT GRN/WHT
3213
HO2S Heater High Control (w/Isolated Grounded Sensors)

75
--
--
Not Used

76
LT GRN/WHT
1749
IAC Coil B High Control

77
LT GRN/BLK
444
IAC Coil B Low Control

78
LT BLU/BLK
1748
IAC Coil A Low Control

79
LT BLU/WHT
1747
IAC Coil A High Control

80
LT GRN
3212
HO2S Heater Low Reference

 

so... i had perfectly fine 4l65e. did a trans swap. and possible tore a wire up in the process? I'm so tempted to just get the harness from a 2500 with 6.080e. now i have to return this internal harness that just came in

 

If I could find out which wire it is at the PCM I'll check it. I don't wanna waste a credit revinning my PCM to maybe fix the problem. Would the wire @ the trans be the same color as @ the PCM?

Badass you dbw or dbc?

 

dew everything is perfect. it just doesn't read temp right. and when it says trans hot it drives weird and locks and unlocks and shifts way harder cause it thinks the fluid is getting thin from being hot.

this bothers me so bad i sometimes wanna swap a 65 back in it and be done.

 

Have you checked yours with a laser heat gun? Mine just shows hot but doesn't change how it acts.. It still acts normal.

I bought a piece of clear hose. Put it on the pressure side to the cooler ( so I could see the fluid) hose filled up fast & got warm quick. Kill the truck & put the clear hose on the return side of the cooler. Didn't fill up & had air bubbles in the line. So I was like I'm on to something. Got a rubber hose & went from cooler to clear jug & it filled it pretty fast. So I tried to blow threw the return line back to trans & couldn't ( with mouth) so I removed line from trans & was able to blow threw it with mouth. Put the fitting out the trans & it didn't have anything blocking it so I got the air blower & blew threw the line & trans return with compressed air. Put it all back together & same ****. Went bought a heat gun & now I know it's not getting hot. Once my gauge is @ 250 I can feel heat in the lines & hoses on the feed side. So cooler is working just gauge is being stupid.

 

yeah mine will say trans hot and i can grab the lines.

like i said i hooked a snap on modi us up to it and drove around. it read 155 or so most the drive. went up to 170 sitting and such.

i ended up not driving it far enough for the gauge to read wrong. but i don't understand why yours doesn't act weird when it goes into the factory transmission hot limp mode.

I've also though about making it a manual valve bodie and forgetting about all of it. i really have no problem in shifting where i go. and found a sweet set up for a shifter in my center console

 

For a temporary solution, just copy your normal shift/lockup tables to the hot tables. Or max out the temp it changes to the hot tables. Then at least it won't shift weird.

 

my tuner did that on last tune. and either way once it goes into hot mode it does still drive normal but it locks and unlocks every 3 seconds.

 

Well I tried another PCM same ole ****.. I had a guy search gm data base for this problem & he came up with nothing. So I might just get him to enter the problem in data base & see if some else can figure it out.

 

Seems kinda hard to believe, but it seems like the new sensor is bad.. We checked the ohms & a given temp @ a certain ohm is about 40 off from the gun.. Badass can you check the ohms on your new harness @ room temp for me..