P0761 on GMC: How to Diagnose & Fix
Shift Solenoid 'C' Performance or Stuck Off
1 GMC model · 1 documented issue · 1 critical · $600-$2,500 repair
P0761 on GMC by model: symptoms, diagnosis and fix
P0700 itself is only a flag: the Transmission Control Module has stored one or more transmission faults and is requesting the MIL. On Sierra 1500s with the 6L80 (and 6L90 on heavier variants) 6-speed automatic, the notable design issue is that the TCM is integrated into the valve body as a TEHCM (transmission electro-hydraulic control module), bolted inside the pan and sitting in 180-250°F fluid. Repeated heat cycling degrades the module and its integrated pressure switches and solenoids. When the TEHCM or a shift/pressure-control solenoid begins to fail, it sets specific sub-codes (e.g., P2534, P0742, P0761) plus the umbrella P0700, and the truck can exhibit harsh or missed shifts, slipping, or limp mode. Critically, on the 6L80/6L90 the solenoids are over-molded into the non-serviceable TEHCM and generally can't be replaced individually.
Common Symptoms
- Check engine light with transmission sub-codes
- Harsh or delayed shifts
- Slipping
- Loss of gears / limp mode
- Torque converter shudder
How to Fix
P0700 alone is not actionable — pull the transmission-specific sub-codes with a capable scanner to find the real fault. Check fluid level/condition first. Repairs commonly involve replacing the TEHCM/valve body assembly (solenoids are integrated and non-serviceable) and re-learning shift adaptives; the new TEHCM must be programmed to the VIN. Address any fluid overheating cause to prevent recurrence.
Sources for this issue (1)
P0761 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0761 mean on a GMC?
P0761 stands for "Shift Solenoid 'C' Performance or Stuck Off." Set when shift solenoid 'C' does not respond as commanded or is stuck off, so the gear engagement it controls does not occur properly. On GMC it is documented across 1 model: Sierra 1500.
What are the most common causes of P0761?
The most common causes of P0761 are: Shift solenoid 'C' stuck off, Debris in valve body, Low/contaminated fluid, Wiring resistance, Worn solenoid. The specific cause varies by vehicle.
How much does it cost to fix P0761 on a GMC?
Published repair estimates on GMC range from $600 to $2,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0761 on a different make?
View P0761 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.