Ok now Im a bmw tech for a living an pretty much have a good handle on which cars have which operating systems and what pcm they have. Now I don't know the gm stuff at all, is there some where I can go to see what year trucks had what pcm? I think my truck is an e38 correct? Id like to know my facts. Also is there anywhere I can look at all the inputs and out puts of the pcm? I wanna see if there are any unused outputs I could use to control various accessories. There is the temp output for the fans to ground a relay but I would really love to control my fan speed by pulse width. Thanks for your help.

Alex

 

It is a 99+ LS1 style PCM.
http://www.chevyavalanchefanclub.com...c,45153.0.html

Here are some controller ID pics from the EFILive documentation.

 

From the service manual:

Powertrain Control Module (PCM) - C1 (Blue)


Connector Part Information

• 12191489
• 80-Way F Micro-Pack 100W Sealed (NAT)

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
BLK
470
Low Reference
24
--
--
Not Used
25
TAN
413
HO2S Low Signal
26
TAN
413
HO2S Low Signal
27
--
--
Not Used
28
TAN
413
HO2S Low Signal
29
TAN
413
HO2S Low Signal
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 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
PPL
719
Low Reference
42
--
--
Not Used
43
RED/BLK
877
Fuel Injector 7 Control
44
LT BLU/BLK
844
Fuel Injector 4 Control
45
--
--
Not Used
46
GRY
474
5 Volt Reference
47
GRY
596
5 Volt Reference
48
GRY
597
5 Volt Reference
49 50
--
--
Not Used
51
DK BLU
496
Knock Sensor 1 Signal
52 53
--
--
Not Used
54
ORN/BLK
469
Low Reference
55
BRN
1456
EGR Valve Position Signal
56
--
--
Not Used
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
510
Low Reference
61
PNK/BLK
632
Low Reference
62-64
--
--
Not Used
65
PPL
1670
HO2S High Signal
66
PPL
1666
HO2S High Signal
67
--
--
Not Used
68
PPL/WHT
1668
HO2S High Signal
69
PPL/WHT
1665
HO2S High Signal
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
78-79
--
--
Not Used
80
ORN/BLK
510
Low Reference



Powertrain Control Module (PCM) - C2


Connector Part Information

• 12191488
• 80-Way F Micro-Pack 100W Sealed (NAT)

Pin
Wire Color
Circuit No.
Function
1
BLK/WHT
451
Ground
2
WHT
2467
Unmanaged Torque Signal
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-Sol. A
7
RED
1676
EGR Valve Supply Voltage
8
LT BLU/WHT
1229
PC Solenoid Valve Low Control-Sol. A
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
12-14
DK GRN
1163
APP Sensor 3 Signal
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
--
--
Not Used
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
35-38
--
--
Not Used
39
RED
631
12 Volt Reference
40
BLK/WHT
451
Ground
41
WHT
257
EGR Solenoid Control
42
--
--
Not Used
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- Sol. B-Valve Control
48
LT GRN
1222
1-2 Shift Solenoid-Sol. A-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
DK BLU
2687
Transmission MIL Request Signal
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
70-71
--
--
Not Used
72
BLK/WHT
3122
HO2S Low Signal
73
DK BLU
1936
Fuel Level Sensor Signal - Secondary
74
LT GRN/WHT
3213
HO2S High Signal
75
RED/WHT
3222
HO2S High Signal
76-79
--
--
Not Used
80
LT GRN
3212
HO2S Low Signal

 

Thanks bro