Workshop Repair and Service Manuals GMC SIERRA
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Electrical

Hybrid Battery Parameter Identification HV Battery      Hybrid Battery Parameter Identification Hybrid Battery Voltage parameter Measures sum of battery pair Battery 1 is located next to cooling fan assembly. Battery 40 is located next to drive motor generator batterycontrol...
Drive Motor Battery System Description Low Voltage Battery - part 4      Each of the 40-hybrid batteries has a vent forelectrolyte gas that is located on the top of each battery. Thehybrid batteries vent system connects all of the 40 hybrid batteryvents to a rubber manifold. The vent exits the...
Drive Motor Battery System Description Low Voltage Battery - part 3      The BECM willclose the HV contactor relays only at the request of the HPCM.Either the BECM or the HPCM can command that the HV contactorrelays be opened in the event a system fault is detected. Thecontactors must be opened and...
Drive Motor Battery System Description Low Voltage Battery - part 2      In the event a hosted module communicates a fault condition,the HPCM will determine if hybrid operation is affected and notifythe vehicle operator by requesting the MIL illuminate and/or bydisplaying a hybrid service required...
Drive Motor Battery System Description Low Voltage Battery      Overview The drive motor generator battery is also referred to as thehybrid battery. The drive motor generator battery contains 40individual battery modules. Each battery module is rated at7.2-volts direct current-(DC) and all...
Drive Motor Battery Odor Low Voltage Battery      Diagnostic Fault Information Perform a visual inspection of all hoses and manifolds in the venting system for kinks,restrictions and poor connections. This could cause gases to back up and create anodor. Check all electrical...
Drive Motor Battery End of Life Resistance Low Voltage Battery      Drive Motor Battery End of Life Resistance Bat. Int. Temp °C (°F) Module Pair Resistance mOhm Pack Resistance Ohms ?10°C (14°F) 141.33 8.93 ?5°C (23°F) 112.05 7.08 0°C (32°F) 88.90 5.62...
Drive Motor Battery Cooling Description Low Voltage Battery      The hybrid drive motor battery has two venting systems. Onefor hybrid battery cooling air and one for venting of possiblegases from the hybrid battery vents. The hybrid batteries ventsystem connects all the battery vents to a...
Drive Motor Battery Noise Low Voltage Battery      Diagnostic Fault Information The hybrid drive motor generator battery has very few movingparts. The moving parts are the 3 high voltage-(HV)contactor relays, the hybrid drive motor battery vent fan relay,and the vent fan...
Battery Disconnect Warning Low Voltage Battery      Warning:Unless directed otherwise, the ignition and start switch must be in the OFF or LOCKposition, and all electrical loads must be OFF before servicing any electrical component.Disconnect the negative battery cable to...
Drive Motor Battery High Voltage Contactor Relay Operation Relays      The hybrid drive motor battery contains 3 relays that allowthe high voltage-(HV) DC batteries to be connected tothe vehicle. The three HV relays are a positive HV contactor relay,negative HV contactor relay and current limit...
Brake Fluid Effects on Paint and Electrical Components Caution      Caution:Avoid spilling brake fluid onto painted surfaces, electricalconnections, wiring, or cables. Brake fluid will damage paintedsurfaces and cause corrosion to electrical components. If any brakefluid comes in contact with...
Fastener Tightening Specifications - 4WD Driveline Control      Fastener Tightening Specifications Application Specification Metric English Air Conditioning (A/C) Compressor/Condenser Hose Bracket Bolt(4.3L) 25-Y 18-lb-ft Auxiliary Battery Hold Down Bolt (6.2L, 6.6L)...
Starter Solenoid Switch Replacement (Diesel)      Removal Procedure The starter switch is replaced with the starter assembly.Refer toStarter Replacement.
Starting System Description and Operation      The starter motors are non-repairable starter motors. They have pole pieces that arearranged around the armature. Both solenoid windings are energized. The pull-in windingcircuit is completed to the ground through the starter...
Starting System Description and Operation      The HP2-hybrid system does not use a conventionalstarter. Refer toHybrid Modes of Operation Descriptionfor information about thestarting system.
Electrical Power Management Description and Operation (Gasoline)      The electrical power management is used to monitor andcontrol the charging system and alert the driver of possibleproblems within the charging system. The electrical powermanagement system makes the most efficient use of the...
Fastener Tightening Specifications - 4WD Driveline Control      Fastener Tightening Specifications Application Specification Metric English Battery Hold Down Retainer Bolt 25-Y 18-lb-ft Battery Tray to Battery Tray Reinforcement Bolts 9-Y 80-lb-in Battery...
Electrical Center Identification Views      Figure 1: Fuse Block - Underhood Label Figure 2: Fuse Block - Underhood Top View - Diesel Figure 3: Fuse Block - Underhood Top View - Gas Figure 4: Fuse Block - Underhood Bottom View Figure 5: Fuse...