Yukon/Denali 2WD V8-4.8L VIN V (2005)
5. Select the VSES Special Functions menu on the scan tool.
6. Select Pre-charge Bleed.
7. Press the On key. The precharge pump runs for approximately 3 seconds, circulating fluid from the master cylinder fluid reservoir, through the
precharge pump and combination valve, then back to the master cylinder.
8. Evaluate the feel of the brake pedal. If the pedal feels spongy, perform a base brake system bleed.
9. Ensure that the master cylinder reservoir is filled to at least the minimum-fill level with Delco Supreme 11, GM P/N 12377967 (Canadian P/N
992667), or equivalent DOT 3 brake fluid from a clean, sealed container.
Automated Bleed
The Automated Bleed procedure is to be performed when the brake pressure modulator valve (BPMV) is replaced. Perform the procedure as follows.
Important: The base brake system must be bled before proceeding.
Important: If the brake system warning lamp is illuminated, DO NOT allow the vehicle to be driven until the concern is diagnosed and repaired.
1. Ensure that the master cylinder reservoir is filled to at least the minimum-fill level with Delco Supreme 11, GM P/N 12377967 (Canadian P/N
992667), or equivalent DOT 3 brake fluid from a clean, sealed container.
2. Ensure the master cylinder reservoir cap is ON securely.
3. Install a scan tool.
4. Turn ON the ignition.
5. Select the VSES Special Functions menu on the scan tool.
6. Select Pre-charge Bleed.
7. Press the On key. The precharge pump runs for approximately 3 seconds, circulating fluid from the master cylinder fluid reservoir, through the
precharge pump and combination valve, then back to the master cylinder.
8. Select Automated Bleed.
9. Press the On key. The precharge pump and ABS pump run for approximately 6 seconds while air is purged from the BPMV.
10. Ensure that the master cylinder reservoir is filled to at least the minimum-fill level with Delco Supreme 11, GM P/N 12377967 (Canadian P/N
992667), or equivalent DOT 3 brake fluid from a clean, sealed container.
11. Perform a base brake system bleed.
12. Evaluate the feel of the brake pedal. If the pedal feels spongy, repeat steps 1-11. If the pedal feel is acceptable, proceed to the next step.
13. Ensure that the master cylinder reservoir is filled to at least the minimum-fill level with Delco Supreme 11, GM P/N 12377967 (Canadian P/N
992667), or equivalent DOT 3 brake fluid from a clean, sealed container.
