BOSCH 0261520135
High Pressure Fuel Pump Buick Regal GS Envision Cadillac ATS CTS Chevrolet Camaro 2.0T LTG 12658478 GDP108
12658478, 12651170, 0261520136, GDP108, HM10028, HPP0018--200 bar peak rail pressureProduct Overview
The BOSCH 0261520135 is a precision automotive OE replacement component engineered specifically for General Motors 2.0L Turbo SIDI Ecotec LTG powertrains. Designed to deliver consistent calibration and factory-specified fuel atomization, this unit restores original throttle response, diagnostic rail pressure stability, and emission compliance.
Verify part 0261520135 and compatibility with the listed Cadillac ATS/ATS-L, Buick Regal, Buick Envision 28T AWD, and Chevrolet Camaro applications before ordering; confirm the pump drive matches the timing belt/chain or camshaft drive and that the system is rated for 200 bar. This high-pressure common-rail pump raises rail pressure and must be fitted with new seals.
Technical Specifications
| Specification | Value |
|---|---|
| part_number | 0261520135 |
| oem_reference | 12658478 |
| manufacturer | BOSCH |
| system_type | High Pressure Fuel Pump |
| pressure_rating | 200 bar (2900 psi) |
| operating_temperature | -40°C to +135°C |
| flange_mount_torque | 15 N-m (11 lb-ft) |
| high_pressure_line_torque | 30 N-m (22 lb-ft) |
| diagnostic_dtc | P0087, P0089, P2293, P0300 |
Matched High-Pressure Fuel Injectors (Fuel Circuit Assembly)
Directly supplied by this high-pressure pump. Verify injector backleak balance if rail pressure fails to build during engine cranking.
Installation Tips
- Depressurize the fuel system before disconnecting any high-pressure lines.
- Clean the pump mounting area and fuel line connections.
- Inspect the timing belt/chain or camshaft drive and the pump drive coupling.
- Fit new seals to the high-pressure pump before installation.
- Install the high-pressure pump and align its drive correctly.
- Prime the fuel circuit after pump installation.
- Check the fuel circuit for leaks and confirm rail pressure builds to 200 bar.
- Run the engine and recheck the pump area for leaks.
- Use new seals, prime the fuel circuit, and check for leaks after installation.
- The high-pressure pump raises rail pressure to 200 bar and is driven by the timing belt/chain or camshaft; confirm drive alignment before starting.
- Do not reuse old seals or start the engine before priming the fuel circuit.
Frequently Asked Questions
Will this high-pressure fuel pump fit my Cadillac ATS, Buick Regal, Buick Envision 28T AWD, or Chevrolet Camaro?
It is listed for Cadillac ATS/ATS-L (2013-2019), Buick Regal (2014-2020), Buick Envision 28T AWD (2015-2020), and Chevrolet Camaro (2016-2020) with the GM 2.0L Ecotec Turbo SIDI engine family (LTG / LSY Tripower / LHU). Confirm the exact engine code and part number for your VIN against the vehicle's EPC before ordering.
What diagnostic trouble codes can indicate a problem with this pump?
The supplied diagnostic trouble codes for this listing are P0300, P0087, P0193, P0089, and P0191. Use these codes with the vehicle's service information; no additional symptom or diagnostic criteria are stated here.
What are the mounting and high-pressure line torque specifications?
The mounting/hold-down torque is 15 N·m. The high-pressure line torque is 30 N·m, and the system pressure is 200 bar.
Does this pump require coding or adaptation after installation, and can I reuse the seals?
Coding/adaptation requirements and seal reuse are not stated in the supplied facts; confirm both against the vehicle's EPC or service information rather than guessing. The listed part number is 0261520135, with cross references 0261520135, 12658478, 12651170, 0261520136, GDP108, and HM10028.
Diagnostic Trouble Codes & Fault Protocols
Common diagnostic trouble codes (DTCs) triggered when this common rail injector experiences wear, circuit faults, or calibration drift:
Cross-Reference & Compatibility
Sister parts, same-platform variants, and known incompatibilities.
Technical Diagnostic & Service Protocols
Authoritative field procedures, diagnostic testing thresholds, and service SOPs for this assembly.