P2635: owner reports and bulletins

Powertrain (generic, all makes). We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got P2635 on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.

What owners report to NHTSA

15 complaints filed with NHTSA mention P2635, 15 of them since 2015, across 10 different models. The component owners most often filed it under: fuel/propulsion system.

Most-reported models

VehicleComplaintsModel years reported
CHEVROLET TAHOE62017, 2019

Manufacturer service bulletins that name P2635

72 technical service bulletins and manufacturer communications filed with NHTSA mention P2635, from 5 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • CHEVROLET SILVERADO 2500 (2024), bulletin 10237690: This Preliminary information communicates that there is a software issue in the ecmfor the following dtc'sP062D P163A P163B, P0402 P144E. P2635 which could cause a crank, no start issue, and how to correct.
  • GMC SIERRA 2500 (2024), bulletin 10237690: This Preliminary information communicates that there is a software issue in the ecmfor the following dtc'sP062D P163A P163B, P0402 P144E. P2635 which could cause a crank, no start issue, and how to correct.
  • CHEVROLET SILVERADO 3500 (2024), bulletin 10254016: This service bulletin provides a procedure to correct the condition of Malfunction Indicator Lamp Illuminated with DTCs P0402, P062D, P144E, P242B, P2459, and/or P2635 Set.
  • GMC SIERRA 3500 (2024), bulletin 10254016: This service bulletin provides a procedure to correct the condition of Malfunction Indicator Lamp Illuminated with DTCs P0402, P062D, P144E, P242B, P2459, and/or P2635 Set.
  • CHEVROLET SILVERADO 1500 (2017), bulletin 10190233: Hesitation, Stalling, Engine Speed Flare While Coasting, Unintended Acceleration Feel During a Parking Lot Maneuver, Reduced Surge in Low Speed Maneuvers, Stumble, Harsh Tip-In/Tip-Out, Park-Reverse-Drive Shift Concerns,…
  • GMC YUKON DENALI (2015, 2016, 2014, 2017), bulletin 10190331: Malfunction Indicator Lamp Illuminated (MIL) - DTC P2635 and/or P018B Set In High Ambient Temperatures With Hesitation, Surging and Stalling Condition Some customers may comment that the Malfunction Indicator Light (MIL)…

Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.