Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Load Shed System Description & Operation
2004 Oldsmobile Bravada RWDSECTION Load Shed System Description & Operation
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Load Shed System Description and Operation
| Load Shed Level | Affected Systems | Action Taken |
|---|---|---|
| Load-Shed Level 0 | No systems affected | Normal operation |
| Load-Shed Level 1 | Heated Outside Rear View Mirrors, Heated Rear Window/Rear Window Defrost, Heated Seats | Cycled at 80% duty cycle, OFF for 4 of every 20 second cycle. Indicator and timer not affected. |
| Front Automatic HVAC | Reduce blower speed to 80% of current setting if the HVAC is not in the Defrost mode. The HVAC controller uses a ramping program to make the change invisible to the operator. No action is taken if the HVAC system is in Defrost. | |
| Rear Automatic HVAC | Turn OFF blower. The operator must turn ON system when load-shed level is exited. System will not respond to operator input until current load-shed level is exited. | |
| Message Center, Instrument Cluster | No messages or indicators are displayed. Data (DPID) indicating that the Load-Shed 1 was entered is stored and may be accessed with a scan tool. DPID will reset after 50 ignition switch cycles with no repeated load-shed 1 action or with a battery disconnection. | |
| Load-Shed Level 2 | Heated Outside Rear View Mirrors, Heated Rear Window/Rear Window Defrost, Heated Seats | Turned OFF. Indicator and timer also turned OFF. The operator must turn ON system when load-shed level is exited. System will not respond to operator input until current load-shed level is exited. This system will respond to only one Load-Shed Level 2 command per ignition switch cycle. |
| Front Automatic HVAC | Blower turned OFF if the HVAC system is not in the Defrost mode. No action is taken if the HVAC system is in the Defrost mode. Operator may over-ride by manually turning the blower ON. This system will respond to only one Load-Shed 2 command per ignition switch cycle. | |
| Rear Automatic HVAC | Rear HVAC blower remains OFF. The operator must turn ON system when load-shed level is exited. System will not respond to operator input until current load-shed level is exited. This system will respond to only one Load-Shed Level 2 command per ignition switch cycle. | |
| Message Center, Instrument Cluster | "Battery Saver Action" message is displayed. Battery/Charging System Failure icon is illuminated. Chime may be activated constantly until the load-shed level is exited. Data (DPID) indicating that the Load-Shed Level 2 was entered is stored and may be accessed with a scan tool. DPID will reset after 50 ignition switch cycles with no repeated Load-Shed 2 actions or with a battery disconnection. |
RENDER: 1.0x
NO RELATED
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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.