B0790
Transfer Case Neutral Indicator Circuit Malfunction
What it means
B0790. Transfer Case Neutral Indicator Circuit Malfunction. This Chevy-enhanced code applies to Silverado, Sierra, Tahoe, Yukon, Suburban.
Findings, check these first
- Faulty transfer case neutral position switch
- Damaged wiring to the transfer case control module (TCCM)
- Corroded electrical connector at the transfer case
- Worn or sticking transfer case shift linkage
- Failed transfer case control module (TCCM)
Standard procedure
- Scan TCCM data with a scan tool and confirm neutral switch state
- Inspect the transfer case connector for corrosion and pin damage
- Test neutral switch continuity in each range position
- Check shift linkage adjustment and transfer case fluid condition
- Replace the neutral switch first; replace the TCCM only if circuits test good
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Sources and review
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Last updated 2026-09-25.
Report a correction for B0790. Include your vehicle, the issue and a source if you have one.