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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1544 (POWER SEAT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC TROUBLE CODE (DTC) LIST
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Diagnostic Trouble Code (DTC) List

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Diagnostic Trouble Code (DTC) List
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostic Trouble Code (DTC) List

DTC Diagnostic Procedure Module(s)
B1735 DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820  DSM, PSM
B1740 DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820  DSM, PSM
B1745 DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820  DSM, PSM
B1750 DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820  DSM, PSM
B1755 DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820  DSM, PSM
B1760 DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820  DSM, PSM
B1770 DTC B1770 or B2015  DSM
B1775 DTC B1775, B1780, B2020, or B2025  DSM
B1780 DTC B1775, B1780, B2020, or B2025  DSM
B1785 DTC B1785 or B2030  DSM
B1815 DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820  DSM, PSM
B1820 DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820  DSM, PSM
B1825 DTC B1825, B1850, B1860, B2355, B2365, or B2375  DSM
B1830 DTC B1830, B1835, B1840, B1845, B2075, B2080, B2085, B2090, or B3905  DSM
B1835 DTC B1830, B1835, B1840, B1845, B2075, B2080, B2085, B2090, or B3905  DSM
B1840 DTC B1830, B1835, B1840, B1845, B2075, B2080, B2085, B2090, or B3905  DSM
B1845 DTC B1830, B1835, B1840, B1845, B2075, B2080, B2085, B2090, or B3905  DSM
B1850 DTC B1825, B1850, B1860, B2355, B2365, or B2375  DSM
B1860 DTC B1825, B1850, B1860, B2355, B2365, or B2375  DSM
B2015 DTC B1770 or B2015  PSM
B2020 DTC B1775, B1780, B2020, or B2025  PSM
B2025 DTC B1775, B1780, B2020, or B2025  PSM
B2030 DTC B1785 or B2030  PSM
B2355 DTC B1825, B1850, B1860, B2355, B2365, or B2375  DSM
B2365 DTC B1825, B1850, B1860, B2355, B2365, or B2375  DSM
B2375 DTC B1825, B1850, B1860, B2355, B2365, or B2375  DSM
B2075 DTC B1830, B1835, B1840, B1845, B2075, B2080, B2085, B2090, or B3905  PSM
B2080 DTC B1830, B1835, B1840, B1845, B2075, B2080, B2085, B2090, or B3905  PSM
B2085 DTC B1830, B1835, B1840, B1845, B2075, B2080, B2085, B2090, or B3905  PSM
B2090 DTC B1830, B1835, B1840, B1845, B2075, B2080, B2085, B2090, or B3905  PSM
B2425 DTC B2425 or B2430  DSM
B2430 DTC B2425 or B2430  PSM
B2435 DTC B2435 or B2440  DSM
B2440 DTC B2435 or B2440  PSM
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.