If you guys need any diagrams let me know. Anything from 2001 to 2019 trucks just be specific on what you need.

I will ignore any post that wants every single diagram of their car. If you have a specific Electrical issue let me know. 2001 - 2007.5 are mostly the same.

Do not use me as your first source for diagrams, I'm very unreliable, and lazy.

Template:
GMC/Chevy GM use to switch wire colors until 2007.5
Year:
Model:
Picture of RPO codes in glove box.
Picture of harness with color wires.
Diagrams needed.

Attempting to install a Viper remote start/ alarm system. What do i need for diagrams? Where can i get them?

 

Deleted

 

Thanks so much!!

Year: 2005
Model: 2500hd LT long bed extended cab 6.6

Can you give me the same for a GMC too as I took the module and wiring from a GMC truck? Attached picture is from the GMC that I took the module and wiring from

Diagrams needed. Air bag circuits ( I have a lost communication to ECM code)

 

Just want to say thank you for this thread -
ive used it multiple times as a lurker and finally created an account.

Thank you boss.



IS it possible for you to post the c100 ip to engine connector for a 2005 Gas truck?
ive took pictures of the lbz c100 but am doing a harness swap and believe they are different.

 

If you guys need any diagrams let me know. Anything from 2001 to 2019 trucks just be specific on what you need.

I will ignore any post that wants every single diagram of their car. If you have a specific Electrical issue let me know. 2001 - 2007.5 are mostly the same.

Do not use me as your first source for diagrams, I'm very unreliable, and lazy.

Template:
GMC/Chevy GM use to switch wire colors until 2007.5
Year:
Model:
Picture of RPO codes in glove box.
Picture of harness with color wires.
Diagrams neefded.

first time user maybe you can help please 2006 c4500 6.6 have no ground at starter relay any idea location of ground for starter relay thanks

 

Any change of wire diagram for starting system 2006 c4500 6.6 automatic

 

If you guys need any diagrams let me know. Anything from 2001 to 2019 trucks just be specific on what you need.

I will ignore any post that wants every single diagram of their car. If you have a specific Electrical issue let me know. 2001 - 2007.5 are mostly the same.

Do not use me as your first source for diagrams, I'm very unreliable, and lazy.

Template:
GMC/Chevy GM use to switch wire colors until 2007.5
Year:
Model:
Picture of RPO codes in glove box.
Picture of harness with color wires.
Diagrams needed.

 

Looking to find out what is fuse #20 under hood on a 2020 gmc Duramax. Or get the wiring diagram for fuse block under hood.
Fuse #20 2020-2022: IECR 2 (LD) / EBCM2 (HD)

 

If you guys need any diagrams let me know. Anything from 2001 to 2019 trucks just be specific on what you need.

I will ignore any post that wants every single diagram of their car. If you have a specific Electrical issue let me know. 2001 - 2007.5 are mostly the same.

Do not use me as your first source for diagrams, I'm very unreliable, and lazy.

Template:
GMC/Chevy GM use to switch wire colors until 2007.5
Year:
Model:
Picture of RPO codes in glove box.
Picture of harness with color wires.
Diagrams needed.

I

 

Got a 2005 lly and I’m looking for the wiring diagram for the c shift solenoid in the transmission

 

need wiring schematic for a 2004.5 GMC 2500HD SLT crew cab. Lost all power to the drivers side door. Inside dome lights won’t come on when unlocking or opening door.

 

Would like if you could the wire/pin location on cpm J3 plug. That would be on a 2016 2500 with 6.6 duramax Thanks in advance

 

I just replaced my 2003 lb7 cab with an 2004 6.0 due to rust & i read on my c100 connector pin is missing yellow wire body side where is it supposed to connect to in the cab

 

Could I get ground points for the maf on a 2009 lmm. Thanks

 

Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor (Diesel)

​

Click to Enlarge​

Connector Part Information OEM Connector: 15443141 Service Connector: 19151506 Description: 5-Way F TS Series Sealed (BK)

Terminal Part Information Pins: 1–5 (Early Production) Terminal/Tray: 8100-3455/22 Core/Insulation Crimp: 8/8 Release Tool/Test Probe: 15315247/J-35616-64B (L-BU) Pins: 1–5 (Late Production) Terminal/Tray: 8100-3456/26 Core/Insulation Crimp: K/K Release Tool/Test Probe: 15315247/J-35616-64B (L-BU)

Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor (Diesel)

Pin	Wire	Circuit	Function
1	0.5 YE	492	MAF Sensor Signal
2	0.5 GY/BK	2931	Low Reference
3	0.5 PK	1839	Ignition 1 Voltage
4	0.5 TN	2760	Low Reference
5	0.5 TN/BK	472	IAT Sensor 1 Signal

 

If you guys need any diagrams let me know. Anything from 2001 to 2019 trucks just be specific on what you need.

I will ignore any post that wants every single diagram of their car. If you have a specific Electrical issue let me know. 2001 - 2007.5 are mostly the same.

Do not use me as your first source for diagrams, I'm very unreliable, and lazy.

Template:
GMC/Chevy GM use to switch wire colors until 2007.5
Year:
Model:
Picture of RPO codes in glove box.
Picture of harness with color wires.
Diagrams needed.

I need wiring diagram for abs module harness for 2008 silverado crew cab LT Texas edition 5.3 V8. Can you help?

 

It's been a couple of days do you still need it?

 

If you guys need any diagrams let me know. Anything from 2001 to 2019 trucks just be specific on what you need.

I will ignore any post that wants every single diagram of their car. If you have a specific Electrical issue let me know. 2001 - 2007.5 are mostly the same.

Do not use me as your first source for diagrams, I'm very unreliable, and lazy.

Template:
GMC/Chevy GM use to switch wire colors until 2007.5
Year:
Model:
Picture of RPO codes in glove box.
Picture of harness with color wires.
Diagrams needed.

Any idea what this is? Was plugged into a harness coming off EDU on a LB7 duramax. The other end was just hanging their. Thanks.

 

If you guys need any diagrams let me know. Anything from 2001 to 2019 trucks just be specific on what you need.

I will ignore any post that wants every single diagram of their car. If you have a specific Electrical issue let me know. 2001 - 2007.5 are mostly the same.

Do not use me as your first source for diagrams, I'm very unreliable, and lazy.

Template:
GMC/Chevy GM use to switch wire colors until 2007.5
Year:
Model:
Picture of RPO codes in glove box.
Picture of harness with color wires.
Diagrams needed.

I have a 2015 duramax LML i need a diagram of the engine harness and the ECM pinout. Please and Thank you.

 

If you guys need any diagrams let me know. Anything from 2001 to 2019 trucks just be specific on what you need.

I will ignore any post that wants every single diagram of their car. If you have a specific Electrical issue let me know. 2001 - 2007.5 are mostly the same.

Do not use me as your first source for diagrams, I'm very unreliable, and lazy.

Template:
GMC/Chevy GM use to switch wire colors until 2007.5
Year:
Model:
Picture of RPO codes in glove box.
Picture of harness with color wires.
Diagrams needed.

Hi and thanks that you are doing this.

i need the whole colored wire diagrams for 2011-LML T-case. From Dash Switch, t-case controller and t-case motor.

Something like this, this schematic is wrong year, but the switch and box is correct year.

Thanks

 

Hi and thanks that you are doing this.

i need the whole colored wire diagrams for 2011-LML T-case. From Dash Switch, t-case controller and t-case motor. View attachment 1099608 View attachment 1099609

Something like this, this schematic is wrong year, but the switch and box is correct year.

Thanks

RPO CODE?!?! GLOVE BOX!!!

Each have their own wiring diagram. Therefore I can't give you whatever.

RPO NQG, 1222/1225/1226
RPO NQF, 1625/1626
RPO NQH, 3023/3024

 

Wiring diagrams are posted separately.

Transfer Case 2/4 Wheel Drive Actuator Position Sensor (NQH)

​

​

Click to Enlarge​

Connector Part Information Harness: Engine OEM: 15326808 Service: 15306388 Description: 3-Way F GT 150 Sealed 4.5 (BK)

Terminal Part Information Terminated Lead: 13327112 Release Tool: J-38125-553 Diagnostic Test Probe: J-35616-2A (GY) Terminal/Tray: 12191819/8 Core/Insulation Crimp: E/1

Transfer Case 2/4 Wheel Drive Actuator Position Sensor (NQH)

Pin	Wire	Circuit	Function
A	0.5 YE/BK	7478	Low Reference
B	0.5 OG/WH	7477	5-Volt Reference
C	0.5 L-GN	7479	Rotary Position Sensor Signal

Transfer Case Encoder Motor (NQF or NQH)

​

​

Connector Part Information Harness: Engine (Gas) Harness: Engine Chassis (Diesel) OEM: 15326654 Service: 88986254 Description: 8-Way F GT 280 Sealed 5.8 (L-GY)

Terminal Part Information Terminated Lead: Service by Connector Assembly - 88986254 Release Tool: Not Available Diagnostic Test Probe: Not Available Terminal/Tray: Not Available Core/Insulation Crimp: Not Available

Transfer Case Encoder Motor (NQF or NQH)

Pin	Wire	Circuit	Function
A	3 TN	1552	Motor Control A
B	3 RD/BK	1342	Battery Positive Voltage (NQH)
C	2 TN	1569	Lock Solenoid Control (NQH)
D	3 OG	1553	Motor Control B
E	0.35 D-BU/WH	7473	Incremental Encoder Impulse Signal (except NQH with LU3)
0.35 L-GN/D-BU	7473	Incremental Encoder Impulse Signal (NQH with LU3)
F	0.35 YE	7474	Incremental Encoder Direction Signal
G	0.35 WH/L-GN	7475	Incremental Encoder Sensor (8V) Supply
H	0.35 PU	7476	Low Reference

Transfer Case Shift Control Module X1 (NQF or NQH)

​

​

Click to Enlarge​

Connector Part Information Harness Type: Instrument Panel OEM Connector: 13520383 Service Connector: 13577630 Description: 16-Way F 150 GT FBT Series (GY)

Terminal Part Information Pins: 2–3, 5–6, 9–15 Terminated Lead: 13575481 Release Tool: J-38125-29 Diagnostic Test Probe: J-35616-2A (GY) Terminal/Tray: Not Available Core/Insulation Crimp: Not Available Pins: 4, 7 Terminated Lead: 13575480 Release Tool: J-38125-29 Diagnostic Test Probe: J-35616-2A (GY) Terminal/Tray: Not Available Core/Insulation Crimp: Not Available

Transfer Case Shift Control Module X1 (NQF or NQH)

Pin	Wire	Circuit	Function
1	—	—	Not Used
2	0.35 GY	6029	5-Volt Reference
3	0.35 D-BU/WH	7473	Incremental Encoder Impulse Signal
4	0.5 OG/WH	7477	5-Volt Reference (NQH)
5	0.35 BN	1560	Neutral Indicator Control
6	0.35 L-GN/BK	1563	2 HI Indicator Control
7	1 TN	1569	Lock Solenoid Control (NQH)
8	—	—	Not Used
9	0.35 WH/L-GN	7475	Incremental Encoder Sensor (8V) Supply
10	0.35 PU	7476	Low Reference
11	0.35 L-BU	1693	Switch Signal
12	0.35 TN/BK	1566	4 HI Indicator Control
13	0.35 PU/WH	1565	4 LO Indicator Control
14	0.35 PK	1561	AWD Indicator Control (NQH)
15	0.35 GY/BK	1570	Axle Actuator – Control
16	—	—	Not Used

Transfer Case Shift Control Module X2 (NQF or NQH)

​

​

Connector Part Information Harness Type: Instrument Panel OEM Connector: 13547238 Service Connector: 88988779 Description: 16-Way F 1.5 Series (BN)

Terminal Part Information Terminated Lead: 13575790 Release Tool: J-38125-553 Diagnostic Test Probe: J-35616-2A (GY) Terminal/Tray: 8240-0127/22 Core/Insulation Crimp: E/C

Transfer Case Shift Control Module X2 (NQF or NQH)

Pin	Wire	Circuit	Function
1–2	—	—	Not Used
3	0.5 TN/WH	1695	Axle Switch Signal
4	0.5 TN	2501	High Speed GMLAN Serial Data Bus (-)
5	0.5 TN/BK	2500	High Speed GMLAN Serial Data Bus (+)
6	0.35 PK	239	Ignition 1 Voltage
7–8	—	—	Not Used
9	0.5 YE/BK	7478	Low Reference (NQH)
10	0.5 D-BU	5985	Accessory Wakeup Serial Data
11	0.5 L-GN	7479	Rotary Position Sensor Signal (NQH)
12	0.5 TN	2501	High Speed GMLAN Serial Data Bus (-)
13	0.5 TN/BK	2500	High Speed GMLAN Serial Data Bus (+)
14	0.35 YE	7474	Incremental Encoder Direction Signal
15–16	—	—	Not Used

Transfer Case Shift Control Module X3 (NQF or NQH)

​

​

Click to Enlarge​

Connector Part Information Harness Type: Instrument Panel OEM Connector: 15466671 Service Connector: 19149301 Description: 4-Way F GT 280 Series (L-GY)

Terminal Part Information Terminated Lead: 13575756 Release Tool: J-38125-553 Diagnostic Test Probe: J-35616-4A (PU) Terminal/Tray: 15304713/19 Core/Insulation Crimp: F/D

Transfer Case Shift Control Module X3 (NQF or NQH)

Pin	Wire	Circuit	Function
A	3 OG	1553	Motor Control B
B	3 TN	1552	Motor Control A
C	3 RD/BK	1342	Battery Positive Voltage
D	3 BK	550	Ground

Transfer Case Shift Control Switch (NQF or NQH)

​

​

Click to Enlarge​

Connector Part Information Harness Type: Instrument Panel OEM Connector: 13587624 Service Connector: 19151154 Description: 12-Way F 64 Series, Sealed (GY)

Terminal Part Information Terminated Lead: 13575845 Release Tool: J-38125-215A Diagnostic Test Probe: J-35616-64B (L-BU) Terminal/Tray: Not Available/ Core/Insulation Crimp: P/P

Transfer Case Shift Control Switch (NQF or NQH)

Pin	Wire	Circuit	Function
1	—	—	Not Used
2	0.35 WH	2283	Ignition 1 Voltage
3	0.35 BN	1560	Neutral Indicator Control
4	0.35 PU/WH	6816	Indicator Dimming Control
5	0.5 BN/WH	230	Instrument Panel Lamps Dimming Control
6	0.5 BK	1050	Ground
7	0.35 L-GN/BK	1563	2 HI Indicator Control (NQF)
0.35 PK	1561	AWD Indicator Control (NQH)
8	0.35 L-GN/BK	1563	2 HI Indicator Control (NQH)
9	0.35 TN/BK	1566	4 HI Indicator Control
10	0.35 PU/WH	1565	4 LO Indicator Control
11	0.35 GY	6029	5-Volt Reference
12	0.35 L-BU	1693	Switch Signal

[/QUOTE]

 

Diagrams. Message if wrong.

 

Thank you so much🙏 That helps me a lot! It’s awesome that you help out like this

 

If you guys need any diagrams let me know. Anything from 2001 to 2019 trucks just be specific on what you need.

I will ignore any post that wants every single diagram of their car. If you have a specific Electrical issue let me know. 2001 - 2007.5 are mostly the same.

Do not use me as your first source for diagrams, I'm very unreliable, and lazy.

Template:
GMC/Chevy GM use to switch wire colors until 2007.5
Year:
Model:
Picture of RPO codes in glove box.
Picture of harness with color wires.
Diagrams needed.

 

I need a ground 3 wire schematic for 2011 gmc hd2500 Transfercase so I can figure out why it’s only showing 2 of three ground wires as working as grounding wires and I’m not able to trace the single black wire to it’s origin!

 

If you guys need any diagrams let me know. Anything from 2001 to 2019 trucks just be specific on what you need.

I will ignore any post that wants every single diagram of their car. If you have a specific Electrical issue let me know. 2001 - 2007.5 are mostly the same.

Do not use me as your first source for diagrams, I'm very unreliable, and lazy.

Template:
GMC/Chevy GM use to switch wire colors until 2007.5
Year:
Model:
Picture of RPO codes in glove box.
Picture of harness with color wires.
Diagrams needed.

Look for where pink plug goes for rear door windows and locks 2003 chevy

 

Hello! I hope you are still helping people out! I need the diagram for the Dash Cluster. I have 2006 Silverado 2500HD with Duramax. The dash isnt working properly, like the check engine light isn't coming on and the turn signals are not working,

 

​

Click to Enlarge​

Connector Part Information OEM: 12110088 Service: 15306210 Description: 24-Way F Micro-Pack 100 Series (GY)

Terminal Part Information Terminal/Tray: 12146447/3 Core/Insulation Crimp: E/C Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)

Instrument Panel Cluster (IPC)

Pin	Wire Color	Circuit No.	Function
A1	BN/WH	419	MIL Control
A2	D-BU	507	Wait to Start Indicator Control (Diesel)
A3	BK/WH	174	Low Washer Fluid Indicator Supply Voltage (Except 4.3L w/o YE9)
A4	D-GN/WH	817	Vehicle Speed Signal
A5	WH	121	Engine Speed Signal
A6	GY	1036	Class 2 Serial Data
A7	—	—	Not Used
A8	D-BU	2115	Right Turn Signal Lamps Supply Voltage
A9	D-BU	2713	Supplemental Brake Assist Signal (JC4)
A10	D-GN/WH	1932	Transmission Shift Select Switch (Park) Signal
A11	RD	2353	Instrument Panel Lamps Dimming Supply Voltage
A12	BK	1050	Ground
B1	L-BU	2114	Left Turn Signal Lamps Supply Voltage
B2–B3	—	—	Not Used
B4	OG	1816	DIC Mode Switch Signal
B5	D-BU	894	DIC Toggle Switch Signal
B6	D-GN/WH	1358	DIC Switch Signal
B7	YE	1327	DIC Fuel Signal
B8	—	—	Not Used
B9	PK	639	Ignition 1 Voltage (w/o 8S8)
PK	739	Ignition 1 Voltage (w/8S8)
B10	—	—	Not Used
B11	OG	2840	Battery Positive Voltage (w/o 8S8)
OG	4540	Battery Positive Voltage (w/8S8)
B12	BK/WH	1851	Ground

 

2017 2500HD. Module locations list? Thanks?

 

I need the wiring diagram from the U/H BEC to the I/P connector. Here is my problem: I/P cluster not working properly, no turn signals, A/C compressor will not come on. I'm pretty sure I need to trace the short in the wire from the IGN E fuse to the I/P Cluster connector. Also, what pin in the I/P cluster is powered by the IGN E fuse?

 

If you guys need any diagrams let me know. Anything from 2001 to 2019 trucks just be specific on what you need.

I will ignore any post that wants every single diagram of their car. If you have a specific Electrical issue let me know. 2001 - 2007.5 are mostly the same.

Do not use me as your first source for diagrams, I'm very unreliable, and lazy.

Template:
GMC/Chevy GM use to switch wire colors until 2007.5
Year:
Model:
Picture of RPO codes in glove box.
Picture of harness with color wires.
Diagrams needed.

I have a 2003 gmc 2dr 4x4 long box lb7

I have tired to trace wires, checked NSBU switch, starter works, ignition switch works, I can jump the relay to crank the truck over but won’t start.

All main grounds are good

No power to edu and ecmrpv fuse

No check engine light, no glow plug light on dash

No engine code except U1000 (normally I do)

Not sure what wiring diagrams I could use to help me, but any help is much appreciated. Thanks in advance

 

Hello, and thank you for this thread, I've been downloading everything I can find for my 2008 Chevy 2500 duramax
Could I get diagram for the underhood fuse block , and bcm please?
And ground locations please

 

Hello, and thank you for this thread, I've been downloading everything I can find for my 2008 Chevy 2500 duramax
Could I get diagram for the underhood fuse block , and bcm please?
And ground locations please

Message @Ron Nielson he has a 2008 lmm and has all data diy. I would help, but I'm to busy. Plus he knows the GMT 900 platform more then I do.