Hearing a loud hum from under your hood long after you shut off your Silverado is a red flag. That sound is your ABS pump running nonstop, and it usually means the electronic brake control module has failed. On 1999 to 2006 models, this issue is so common that it has its own diagnostic code: C0265. Dealerships often quote $900 or more for a full replacement, but a professional Silverado ABS module repair typically costs under $140 and keeps your truck’s original calibration intact.
This guide covers how to confirm the failure, identify your exact module, choose the right repair service, and get your brakes working again without dealer-level programming.
Spot the Warning Signs of ABS Module Failure
Listen for the Constant Pump Hum
The clearest symptom of a bad ABS module is the pump running when it should not be. The pump should only activate during hard braking or wheel slip. If it runs while the truck sits idle, internal relays inside the module have likely welded shut, sending constant power to the motor.
Letting this continue can burn out the hydraulic pump motor, turning a $140 repair into a $500 problem.
Watch Your Dashboard
Along with the noise, expect to see:
– The ABS warning light illuminated
– The BRAKE light on
– A non-working speedometer on some model years
– False wheel speed sensor codes, even with good sensors
These signs point to internal electronic failure, not bad sensors or low fluid.
Scan for Trouble Codes
Plug in an OBD2 scanner before assuming the module is bad. The C0265 code is the gold-standard indicator of Kelsey Hayes module failure. It signals a malfunction in the relay contacts or pump motor circuit.
Other related codes include:
– C0267: Pump motor circuit open or short
– C1214: Solenoid valve relay or coil failure
– C1248: ABS system disabled
If you only see the ABS light without C0265, check wheel speed sensors, brake fluid, and wiring first.
Pull the Fuse to Prevent Burnout
If the pump will not shut off, act immediately:
1. Open the under-hood fuse box.
2. Find the ABS pump fuse (usually 50A or 60A).
3. Pull the fuse to cut power.
Your regular brakes will still work, but ABS will be disabled until the module is fixed.
Identify Your ABS Module Before Ordering
Kelsey Hayes vs. TRW: Not Interchangeable
Silverado ABS modules come from two main manufacturers, and they are not cross-compatible. Most repair shops service Kelsey Hayes units only, especially the 325 series found on 1999 to 2006 trucks.
Kelsey Hayes modules use a separate electronic controller mounted on top of the hydraulic pump. Only the electronic top portion is sent for repair. TRW modules are physically different and often require full assembly replacement. Sending a TRW unit to a Kelsey Hayes specialist will get it rejected.
Find Your Part Number
Your module’s part number is printed on a label on the top of the electronic control unit. Always take a clear photo before removal.
Common Kelsey Hayes part numbers (1999 to 2006):
– 12475228, 12475557, 12475562, 12475564
– 19244881, 19244888, 19244895, 19244907
– 88934715, 88934716, 88935640, 88935723
– 88982286, 88982288, 88982305, 88982309
Later model part numbers (2015+):
– 84256780, 84256781, 84256785, 84778358
– 23380704, 22838405
Exchange unit numbers:
– Kelsey Hayes (no traction): 13354716, 13354718
– TRW: 13567112, 13567145, 13567146
Repair vs. Replacement: Which Saves More?
Repair Your Original Module
For most owners, repairing the original ABS module is the smartest move. You ship only the electronic controller, and a specialist fixes it in one to two business days.
Key benefits:
– No reprogramming required
– Plug-and-play installation
– Cost: $135 to $140 for standard Kelsey Hayes units
– Savings: Up to 80% less than a new dealer module
Repair addresses the root cause, including cracked solder joints, failed relays, and corroded circuits, often with upgraded components.
Buy a Remanufactured Exchange Unit
If you cannot wait for repair turnaround, a remanufactured exchange unit is an alternative. You pay upfront plus a core deposit of $75 to $100, refunded after you return your old module.
Pricing breakdown:
– Kelsey Hayes (no traction): $199 + $75 core
– TRW units: $249 to $299
– Late models (2015+): $349+ (no core)
Downsides include the risk of receiving a generic unit that needs programming and the hassle of returning your core within 30 days.
What Happens During Professional Repair
The Step-by-Step Workflow
Professional ABS repair is more than resoldering a joint. It is a full diagnostic and rebuild process:
- Order and Label: You order online and receive a prepaid shipping label.
- Remove Module: You remove only the electronic unit, not the hydraulic pump.
- Ship and Inspect: Technicians check for corrosion, burned traces, and failed relays.
- Repair: Faulty capacitors, relays, and solder points are replaced.
- Test: The unit runs on a CAN-bus test bench to simulate real braking.
- Return: The repaired module ships back, often next-day.
Reputable shops use OE-spec or upgraded components to prevent repeat failures.
No Programming Needed
One major advantage of repairing your original module: no software coding required. The module retains your truck’s VIN and calibration. Unlike a new or remanufactured unit that may need a dealership scan tool, a repaired original is plug-and-play.
Avoid “programmable” reman units unless you have GM-level diagnostics. Mismatched calibration can cause ABS failure or speedometer issues.
Compare Repair Costs and Warranty Options
Pricing by Service Tier
| Service Tier | Price | Warranty | Turnaround |
|---|---|---|---|
| Standard (1999–2006) | $135–$140 | 1 Year | 1 Business Day |
| Mid-Range (Camaro/Impala) | $170–$200 | 1–5 Years | 1 Day |
| Premium (2007+ ESP) | $250–$280 | 1 Year | Same Day |
| Late Model (2015+) | $300–$400 | Lifetime | Same Day |
Repairs cost 69% to 80% less than new dealer modules.
Warranty Extension Options
Most repairs include a 1-year limited warranty. You can often upgrade:
– 2-Year: +$30
– 3-Year: +$70
– 5-Year or Lifetime: +$110
A lifetime warranty covers the module for as long as you own the vehicle. Exclusions include water damage, fire, improper installation, or external wiring faults.
Choose a Reputable Repair Provider
Top ABS Module Specialists
Not all repair shops are equal. Look for proven Kelsey Hayes expertise.
Circuit Board Medics (Greenville, SC) focuses on the Kelsey Hayes 325. They offer 100% USA-based service, no core deposit, and strong customer support with a 1-year standard warranty.
UpFix (Buford, GA) handles Silverado, Avalanche, and Corvette modules. Operating since 2006, they charge around $139.99 with a 100% satisfaction guarantee.
XeMODeX specializes in 2015+ and ESP modules. They provide lifetime warranty coverage, same-day turnaround, and full CAN-bus simulation testing.
General exchange shops work for urgent needs or physically damaged modules, but carry higher risk of receiving a generic unit that requires programming.
Prevent Future ABS Failures
Seal Out Moisture
Moisture is a leading cause of module failure. The ABS unit sits low on the frame, exposed to road spray and salt.
After reinstallation:
– Use new mounting screws ($10 upgrade) since old ones often corrode
– Ensure the seal is tight to block water ingress
– Apply dielectric grease to the electrical connector
Skip DIY Circuit Repairs
ABS modules are not DIY-friendly. They use surface-mount components, multi-layer PCBs, and CAN-bus communication. A small soldering error can destroy the module entirely, and without proper test equipment, you cannot verify the repair.
This is a safety-critical system. Leave it to professionals.
Install the Repaired Module
Reattach and Verify
Once your module arrives, installation is straightforward:
- Disconnect the battery for safety.
- Mount the module on the hydraulic pump.
- Use new screws if provided.
- Reconnect the electrical harness.
- Reinstall the ABS fuse.
- Reconnect the battery.
Start the truck. The ABS light should illuminate for 3 to 5 seconds, then turn off. Confirm there is no constant pump noise and that the speedometer works. Scan for codes to verify C0265 is gone.
If the light stays on, check that the module is fully seated and the fuse is properly installed.
Frequently Asked Questions About Silverado ABS Module Repair
What does the C0265 code mean on a Silverado?
C0265 indicates a malfunction in the ABS module’s relay contacts or pump motor circuit. On 1999 to 2006 Silverados, this almost always points to internal failure of the Kelsey Hayes 325 electronic control unit.
Can I drive my Silverado with a bad ABS module?
Yes, but with caution. Pull the ABS pump fuse to stop the motor from running. Your standard brakes will still function, but you will lose anti-lock braking capability until the module is repaired or replaced.
How long does ABS module repair take?
Most professional repair services complete the work in one business day, with return shipping included. Same-day turnaround is available for an extra $50 to $70.
Do I need to program a repaired ABS module?
No. Repairing your original module preserves your truck’s VIN and calibration data. The repaired unit is plug-and-play and requires no dealership coding.
What is the difference between Kelsey Hayes and TRW ABS modules?
Kelsey Hayes modules use a separate electronic controller on top of the hydraulic pump and are the most common failure point on 1999 to 2006 Silverados. TRW modules are a different design and are not serviced by most Kelsey Hayes specialists.
How much does Silverado ABS module repair cost?
Standard repair for a 1999 to 2006 Kelsey Hayes module runs $135 to $140 with a 1-year warranty. Premium and late-model services range from $250 to $400 with extended or lifetime coverage.
Key Takeaways for Silverado ABS Module Repair
A failing ABS module does not require a costly dealership visit. For most 1999 to 2006 Silverados, a professional repair of the Kelsey Hayes 325 module is the fastest, cheapest, and most reliable fix.
Start by confirming the C0265 code and constant pump noise. Identify your part number to confirm compatibility with Kelsey Hayes repair services. Choose a reputable shop with CAN-bus testing and solid warranty options. Pull the ABS fuse immediately if the pump runs nonstop to protect the hydraulic motor.
With a $140 repair and one-day turnaround, your Silverado’s ABS will be back online quickly, without dealer programming or inflated replacement costs.
Ready to fix it? Start with Circuit Board Medics or UpFix for proven results, fast service, and warranty options that fit your needs.
