12698552

1. [
2. {
3. "step": 1,
4. "title": "Depressurize 350-bar Fuel System & Disconnect Battery",
5. "instruction": "Depressurize high pressure fuel rail via diagnostic scan tool or fuel pump relay isolation. Disconnect battery 12V negative terminal."
6. },
7. {
8. "step": 2,
9. "title": "Remove Upper Intake Ducting & Fuel Rail Shielding",
10. "instruction": "Remove charge air piping and acoustic foam insulator. Loosen the high pressure steel fuel rail line (28 N·m) with backup counter-wrench."
11. },
12. {
13. "step": 3,
14. "title": "Extract Injectors & Fit New Teflon Sealing Rings",
15. "instruction": "Use GM injector puller tool EN-47277 to withdraw injectors. Install replacement Teflon combustion seals using expander and compression guide."
16. },
17. {
18. "step": 4,
19. "title": "Torque Rail Fasteners & Check For Fuel Leaks",
20. "instruction": "Press injectors into cylinder head bores. Torque fuel rail retaining bolts to 10 N·m. Tighten high pressure line to 28 N·m. Prime system and inspect for leaks."
21. }
22. ]

Common diagnostic trouble codes (DTCs) triggered when this common rail injector experiences wear, circuit faults, or calibration drift: