12478048 Genuine GM ABS Brake Pressure Modulator Valve
Unit Auto Parts LLC provides a complimentary 2-Year Warranty on all automotive parts. Shop with confidence knowing your purchase is protected. Learn More
Unit Auto Parts LLC provides a complimentary 2-Year Warranty on all automotive parts. Shop with confidence knowing your purchase is protected. Learn More
The 12478048 is a genuine GM ABS brake pressure modulator valve for specified 1999–2006 Cadillac, Chevrolet, and GMC truck and SUV applications. It controls hydraulic pressure through the ABS brake circuits as commanded by the electronic brake control system during wheel-slip conditions.
| Year | Vehicle | Engine | Trims |
|---|---|---|---|
| 2006 | Cadillac Escalade | 6.0L V8 - Gas | Base |
| 2006 | Cadillac Escalade ESV | 6.0L V8 - Gas | Base |
| 2006 | Cadillac Escalade EXT | 6.0L V8 - Gas | Base |
| 2006 | Chevrolet Silverado 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Electric/Gas, 5.3L V8 - Flex, 5.3L V8 - Gas, 6.0L V8 - Gas | Hybrid, LS, LT, SS, WT |
| 2006 | Chevrolet Silverado 1500 HD | 6.0L V8 - Gas | LT |
| 2006 | Chevrolet Suburban 1500 | 5.3L V8 - Flex, 5.3L V8 - Gas, 6.0L V8 - Gas | Base, LS, LT, LTZ, Z71 |
| 2006 | Chevrolet Suburban 2500 | 6.0L V8 - Gas, 8.1L V8 - Gas | LS, LT |
| 2006 | Chevrolet Tahoe | 4.8L V8 - Gas, 5.3L V8 - Flex, 5.3L V8 - Gas | Base, LS, LT, Z71 |
| 2006 | GMC Sierra 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Electric/Gas, 5.3L V8 - Flex, 5.3L V8 - Gas, 6.0L V8 - Gas | Denali, Hybrid, SL |
| 2005 | Cadillac Escalade | 5.3L V8 - Gas, 6.0L V8 - Gas | Base |
| 2005 | Cadillac Escalade ESV | 6.0L V8 - Gas | Base |
| 2005 | Cadillac Escalade EXT | 6.0L V8 - Gas | Base |
| 2005 | Chevrolet Avalanche 1500 | 5.3L V8 - Flex, 5.3L V8 - Gas | Base, LS, LT, Z66, Z71 |
| 2005 | Chevrolet Silverado 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Electric/Gas, 5.3L V8 - Flex, 5.3L V8 - Gas, 6.0L V8 - Gas | Base, Hybrid, LS, LT, SS, WT, Z71 Off-Road |
| 2005 | Chevrolet Silverado 1500 HD | 6.0L V8 - Gas | Base, LS, LT |
| 2005 | Chevrolet Silverado 2500 HD | 6.0L V8 - CNG, 6.0L V8 - Gas, 6.6L V8 - Diesel, 8.1L V8 - Gas | Base, LS, LT, WT |
| 2005 | Chevrolet Silverado 3500 | 6.0L V8 - CNG, 6.0L V8 - Gas, 6.6L V8 - Diesel, 8.1L V8 - Gas | Base, LS, LT |
| 2005 | Chevrolet Suburban 1500 | 5.3L V8 - Flex, 5.3L V8 - Gas | LS, LT, Z71 |
| 2005 | Chevrolet Suburban 2500 | 6.0L V8 - Gas, 8.1L V8 - Gas | LS, LT |
| 2005 | Chevrolet Tahoe | 4.8L V8 - Gas, 5.3L V8 - Flex, 5.3L V8 - Gas | LS, LT, Z71 |
| 2005 | GMC Sierra 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Electric/Gas, 5.3L V8 - Flex, 5.3L V8 - Gas, 6.0L V8 - Gas | Base, Denali, Hybrid |
| 2004 | Cadillac Escalade | 5.3L V8 - Gas, 6.0L V8 - Gas | Base |
| 2004 | Cadillac Escalade ESV | 6.0L V8 - Gas | Base |
| 2004 | Cadillac Escalade EXT | 6.0L V8 - Gas | Base |
| 2004 | Chevrolet Avalanche 1500 | 5.3L V8 - Gas | Base, Z66, Z71 |
| 2004 | Chevrolet Avalanche 2500 | 8.1L V8 - Gas | Base |
| 2004 | Chevrolet Silverado 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Electric/Gas, 5.3L V8 - Flex, 5.3L V8 - Gas, 6.0L V8 - Gas | Base, Hybrid, LS, LT, SS, WT, Z71 Off-Road |
| 2004 | Chevrolet Silverado 2500 | 6.0L V8 - Gas | Base, LS, LT, WT |
| 2004 | Chevrolet Silverado 2500 HD | 6.0L V8 - CNG, 6.0L V8 - Gas, 6.6L V8 - Diesel, 8.1L V8 - Gas | Base, LS, LT, WT |
| 2004 | Chevrolet Silverado 3500 | 6.0L V8 - CNG, 6.0L V8 - Gas, 6.6L V8 - Diesel, 8.1L V8 - Gas | Base, LS, LT, WT |
| 2004 | Chevrolet Suburban 1500 | 5.3L V8 - Flex, 5.3L V8 - Gas | LS, LT, Z71 |
| 2004 | Chevrolet Suburban 2500 | 6.0L V8 - Gas, 8.1L V8 - Gas | LS, LT |
| 2004 | Chevrolet Tahoe | 4.8L V8 - Gas, 5.3L V8 - Flex, 5.3L V8 - Gas | LS, LT, Z71 |
| 2004 | GMC Sierra 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Flex, 5.3L V8 - Gas, 6.0L V8 - Gas | Base, Denali |
| 2003 | Cadillac Escalade | 5.3L V8 - Gas, 6.0L V8 - Gas | Base |
| 2003 | Cadillac Escalade ESV | 6.0L V8 - Gas | Base |
| 2003 | Cadillac Escalade EXT | 6.0L V8 - Gas | Base |
| 2003 | Chevrolet Avalanche 1500 | 5.3L V8 - Gas | Base, North Face, On Road Edition, WBH, Z71 |
| 2003 | Chevrolet Avalanche 2500 | 8.1L V8 - Gas | Base |
| 2003 | Chevrolet Silverado 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Flex, 5.3L V8 - Gas, 6.0L V8 - Gas | Base, LS, LT, SS, WT |
| 2003 | Chevrolet Silverado 1500 HD | 6.0L V8 - Gas | LS, LT |
| 2003 | Chevrolet Silverado 2500 | 6.0L V8 - Gas | Base, LS, LT |
| 2003 | Chevrolet Silverado 2500 HD | 6.0L V8 - CNG, 6.0L V8 - Gas, 6.6L V8 - Diesel, 8.1L V8 - Gas | Base, LS, LT, WT |
| 2003 | Chevrolet Silverado 3500 | 6.0L V8 - Gas, 6.6L V8 - Diesel, 8.1L V8 - Gas | Base, LS, LT |
| 2003 | Chevrolet Suburban 1500 | 5.3L V8 - Flex, 5.3L V8 - Gas | LS, LT, Z71 |
| 2003 | Chevrolet Tahoe | 4.8L V8 - Gas, 5.3L V8 - Flex, 5.3L V8 - Gas | LS, LT, Z71 |
| 2003 | GMC Sierra 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Flex, 5.3L V8 - Gas, 6.0L V8 - Gas | Base, Denali, SL |
| 2002 | Cadillac Escalade | 5.3L V8 - Gas, 6.0L V8 - Gas | Base |
| 2002 | Cadillac Escalade EXT | 6.0L V8 - Gas | Base |
| 2002 | Chevrolet Avalanche 1500 | 5.3L V8 - Gas | Base, North Face, On Road Edition, Z71 |
| 2002 | Chevrolet Avalanche 2500 | 8.1L V8 - Gas | Base |
| 2002 | Chevrolet Silverado 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Flex, 5.3L V8 - Gas | Base, LS, LT, WT |
| 2002 | Chevrolet Silverado 1500 HD | 6.0L V8 - Gas | LS, LT |
| 2002 | Chevrolet Silverado 2500 | 6.0L V8 - Bi-Fuel, 6.0L V8 - CNG, 6.0L V8 - Gas | Base, LS, LT |
| 2002 | Chevrolet Silverado 2500 HD | 6.0L V8 - Bi-Fuel, 6.0L V8 - CNG, 6.0L V8 - Gas, 6.6L V8 - Diesel, 8.1L V8 - Gas | Base, LS, LT |
| 2002 | Chevrolet Silverado 3500 | 6.0L V8 - Gas, 6.6L V8 - Diesel, 8.1L V8 - Gas | Base, LS, LT |
| 2002 | Chevrolet Suburban 1500 | 5.3L V8 - Flex, 5.3L V8 - Gas | LS, LT, Z71 |
| 2002 | Chevrolet Suburban 2500 | 6.0L V8 - Gas, 8.1L V8 - Gas | LS, LT |
| 2002 | Chevrolet Tahoe | 4.8L V8 - Gas, 5.3L V8 - Flex, 5.3L V8 - Gas | LS, LT, Z71 |
| 2002 | GMC Sierra 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Flex, 5.3L V8 - Gas, 6.0L V8 - Gas | Base, Denali, HT, SL |
| 2001 | Chevrolet Silverado 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Gas | Base, LS, LT |
| 2001 | Chevrolet Silverado 1500 HD | 6.0L V8 - Gas | LS, LT |
| 2001 | Chevrolet Silverado 2500 | 6.0L V8 - Gas | Base, LS, LT |
| 2001 | Chevrolet Silverado 2500 HD | 6.0L V8 - Gas, 6.6L V8 - Diesel, 8.1L V8 - Gas | Base, LS, LT |
| 2001 | Chevrolet Silverado 3500 | 6.0L V8 - Gas, 6.6L V8 - Diesel, 8.1L V8 - Gas | Base, LS, LT |
| 2001 | Chevrolet Suburban 1500 | 5.3L V8 - Gas | Base, LS, LT |
| 2001 | Chevrolet Suburban 2500 | 6.0L V8 - Gas, 8.1L V8 - Gas | Base, LS, LT |
| 2001 | Chevrolet Tahoe | 4.8L V8 - Gas, 5.3L V8 - Gas | Base, LS, LT |
| 2001 | GMC Sierra 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Gas, 6.0L V8 - Gas | C3, SL, SLE |
| 2000 | Chevrolet Silverado 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Gas | Base, LS, LT |
| 2000 | Chevrolet Silverado 2500 | 5.3L V8 - Gas, 6.0L V8 - Gas | Base, LS, LT |
| 2000 | Chevrolet Suburban 1500 | 5.3L V8 - Gas | Base, LS, LT |
| 2000 | Chevrolet Suburban 2500 | 6.0L V8 - Gas | Base, LS, LT |
| 2000 | Chevrolet Tahoe | 4.8L V8 - Gas, 5.3L V8 - Gas, 5.7L V8 - Gas | Base, LS, LT, Limited, Z71 |
| 2000 | GMC Sierra 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Gas | SL, SLE |
| 1999 | Chevrolet Silverado 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Gas | Base, LS, LT |
| 1999 | Chevrolet Silverado 2500 | 5.3L V8 - Gas, 6.0L V8 - Gas | Base, LS, LT |
| 1999 | GMC Sierra 1500 | 4.3L V6 - Gas, 4.8L V8 - Gas, 5.3L V8 - Gas | SL, SLE |
| Condition | New |
| Part Number | 12478048 |
| Brand | GM |
| Part Type | Brake Pressure Modulator Valve |
| Years | 1999–2006 |
| Vehicle | Cadillac, Chevrolet, GMC Trucks and SUVs |
| Brake System | Electronic Brake Control |
| System Function | Hydraulic Brake Pressure Modulation |
| Dimensions | 8.3 × 7.5 × 5.8 in |
| Weight | 6.35 lbs |
| Fitment Type | Direct Replacement |
The 12478048 ABS brake pressure modulator valve is built to match factory hydraulic operation and installation requirements:
The 12478048 is intended for the listed GM vehicles equipped with the corresponding electronic brake control and ABS hydraulic arrangement. Label each hydraulic line before removal and complete the specified brake bleeding procedure after installation.
Verify part number, VIN, model year, vehicle configuration, ABS equipment, hydraulic connections, and applicable factory brake options before installation.