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09-08-45-003E Installation of Electrical Aftermarket Accessories on 2-Mode Hybrid Full Size Trucks - (Jun 21 2012) - part 2

Rating:
winches, power inverters, etc.) on 2011 and beyond GM Hybrid trucks,please refer to the GM Upfitter Integration website at www.gmupfitter.com. The guidelinesbelow apply to the use of existing OEM power distribution centers and wiring. Theydo not address direct battery connected applications. Attachment of highcurrent draw devices on 2008-2010 MY GM hybrid trucks is not recommended.

Important:If the BCM requires reprogramming as part of an accessory installation, the BrakePedal Position (BPP) sensor MUST be re-calibrated on 2012 and newer vehicles.

The following will outline accessing and connecting the electrical aftermarket equipmentto the vehicle power and ground as approved above.

Radio Installation Instructions (2009-2010 Silverado/Sierra Hybrids with RPOs 1HY/3SAOnly)

The location for the radio power and ground can be acquired at the Mid-Bussed ElectricalConnector (MBEC). The power and ground can be connected at this location without havingto splice or cut into the existing wiring.

Danger:The wire harnesses and cables for the hybrid high voltage circuits are encased inan orange colored covering. In addition, high voltage components such as the EnergyStorage System and high voltage cables are affixed with “High Voltage” red danger,and orange warning labels. The intermediate 42 volt system is encased in a blue coloredcovering, and has yellow caution labels on the components, wire harnesses,and cables. Do not remove, open, take apart, or modify these devices. Do not probe,tamper with, cut, or modify high voltage, or intermediate voltage cable or wiring.

MBEC Connection

#09-08-45-003E: Installation of Electrical Aftermarket Accessories on 2-Mode Hybrid Full Size Trucks - (Jun 21, 2012)

The MBEC (4) is located below the instrument panel to the left of the brake pedalas shown above.

#09-08-45-003E: Installation of Electrical Aftermarket Accessories on 2-Mode Hybrid Full Size Trucks - (Jun 21, 2012)

after market

The MBEC has 10 positions for connecting electrical connectors. One of these positionsis designated for aftermarket utilization. Install a connector (P/N-20791502) intothe open position identified as X14 as shown above.

Important:Connector P/N-20791502 comes with a one wire lead installed. This lead will need tobe removed before the connector is pinned for use with a radio.

Within this connector, there is a fused 30 Amp battery feed, a fused 15 Amp batteryfeed, a fused 10 Amp Run/Crank feed, a 300 milliamp Retained Accessory Power (RAP)feed and a ground.

Caution:Do not connect any components to cavity 2 (15 Amp Battery Feed), or cavity 8 (300milliamp RAP Feed). Adding electrical draw to any of these circuits can cause vehicleperformance issues and potentially decreased life of the APM.

The pin out of the connector is as follows:

Cavity

Circuit Description

Circuit Number

Fuse Size

1

Ground

1050

NA

2

Battery Feed (Do Not Use)

4540

15 Amps

3

Not Used

4

Not Used

5

Battery Feed

2340

30 Amps

6

Not Used

7

Run/Crank Feed

739

10 Amps

8

RAP Feed (Do Not Use)

43

300 milliamps

Wire Gauge Selection

For any of these powered connections to be used, circuit protection guidelines mustbe followed to assure that the circuit gauge is selected appropriately so that itwill be protected by the fuse in case of a short circuit.

Fuses     Fuse Location The bi-fuel system has two fuses that are part of the engine compartment wiring harness.Both fuses are in a plastic holder that is mounted inside the engine compartment,near the accessory battery tray.
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