SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 728 (WIRING SYSTEMS - SPECIFICATIONS, COMPONENT VIEWS AND CONNECTOR END VIEWS)SCHEMATIC AND ROUTING DIAGRAMSHARNESS ROUTING VIEWS
1999 GMC Forward Control 5.7 R, Automatic

Harness Routing Views

1999 GMC Forward Control 5.7 R, AutomaticSECTION Harness Routing Views
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Front Body Harness Component View
GM723766Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 S304
2 Inline to Defogger Grid (Power)
3 Rear Compartment Courtesy Lamp - Right
4 Rear Compartment Lid Latch - Right C2
5 Remote Playback Device - CD Changer
6 Rear Compartment Courtesy Lamp - Left
7 Rear Compartment Lid Latch-Left C2
8 Rear Compartment Lid Latch-Left C1
9 Fuel Door Lock Actuator
10 Rear Compartment Lid Latch - Right C1
11 Remote Control Door Lock Receiver (RCDLR)
12 Inline to Defogger Grid (Ground)
13 Speaker - LR
14 G301
15 C302
16 Fuse Block - I/P C3
17 C204
18 S314 and S312
19 G302
20 SP302
21 S302
22 S303
23 Speaker - RR
Fig 2: Forward Lamp Harness Component View
GM723767Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Fuse Block - Underhood C3
2 A/C Compressor Clutch
3 S106
4 S107
5 Electronic Brake Control Module (EBCM)
6 Cooling Fan - Left
7 C107
8 Brake Fluid Pressure Sensor
9 Brake Differential Switch
10 Brake Fluid Level Switch
11 Windshield Washer Fluid Pump
12 Repeater Lamp - Left
13 Windshield Washer Fluid Level Switch
14 G103
15 SP101
16 G101
17 Headlamp Door Assembly - Left
18 Fog Lamp - LF
19 Secondary Air Injection (AIR) Pump
20 S108
21 Cooling Fan - Right
22 Ambient Air Temperature Sensor
23 Fog Lamp - RF
24 Horn Assembly
25 C100
26 C113
27 Headlamp Door Control Module C2
28 Headlamp Door Control Module C1
29 Headlamp Door Assembly - Right
30 G102
31 SP100
32 Secondary Air Injection (AIR) Solenoid
33 A/C Refrigerant Pressure Sensor
34 Repeater Lamp - Right
35 G108
36 C102
37 UHEC C6
38 C148
39 C140
40 C150
Fig 3: Forward Lamp Jumper Harness Component View
GM881480Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 C100
2 Sp102
Fig 4: Body Rear End Harness Routing Component View
GM880389Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 C400
2 S420 - Europe
3 S496 - Japan
4 S490 - Japan/Europe
5 S485 - Japan
6 S482
7 S484 - Domestic
8 S480 - Japan/Europe
9 S492 - Domestic
10 S494 - Japan/Europe
11 License Lamp Inline Fuse-RH (Export)
12 S498
13 S483 - Japan/Europe
14 S481 - Japan/Domestic
15 License Lamp Inline Fuse-LH (Export)
16 Sp400, Sp402 - Export
Fig 5: Fuel Tanks Component View
GM901394Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Fuel Tank - Left
2 Fuel Pump and Sender Assembly
3 C402
4 Fuel Tank Pressure (FTP) Sensor
5 Fuel Level Sensor - Right
6 Fuel Tank - Right
7 C414
8 C412
Fig 6: Pass Through Locations Component View
GM899886Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 P200
2 P202
3 P600
4 P401
5 P501
6 P201
7 P203
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.