Test Procedure

1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Test Procedure
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. If diagnostic system check for system exhibiting symptom has been performed, go to next step. If diagnostic system check for system exhibiting symptom has not been performed, perform appropriate diagnostic system check for suspect system. See BODY CONTROL SYSTEM DIAGNOSTIC SYSTEM CHECKΒ  under SELF-DIAGNOSTIC SYSTEM.
  2. Connect scan tool to Data Link Connector (DLC). DLC is located below driver side of instrument panel, near steering column. Turn ignition switch to RUN position. Using scan tool, retrieve DTCs. If DTC B1007 is retrieved as current, go to next step. If DTC B1007 is not retrieved as current, see DIAGNOSTIC AIDSΒ .
  3. Replace control module. Program control module, if necessary. See PROGRAMMINGΒ . After repair, go to next step.
  4. Using scan tool, clear DTCs. Operate vehicle within code enable criteria. See CODE ENABLE CRITERIAΒ . If DTC resets, repeat test beginning at step Β 2.
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When to See a Mechanic

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

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