P0796 on Chevrolet: How to Diagnose & Fix
Pressure Control Solenoid 'C' Performance or Stuck Off
2 Chevrolet models · 2 documented issues · 1 critical · $150-$1,800 repair
P0796 on Chevrolet by model: symptoms, diagnosis and fix
Gen 5 Camaros with the 6L50/6L80/6L90 six-speed automatic commonly exhibit a 2-3 upshift 'flare' where engine RPM briefly rises before the gear engages, sometimes followed by a firm bump. GM issued bulletins calling a mild 2-3 slip/flare a 'normal characteristic,' but worsening flare typically indicates a real hydraulic leak, most often at the 3-5-Reverse clutch drum or clutch-regulator valve, and can throw pressure/ratio codes. Left unaddressed, slipping accelerates clutch wear.
Common Symptoms
- RPM flares on the 2-3 shift
- Slip or delay between gears
- Firm bump after the flare
- Ratio/pressure codes
- Worsening over time
How to Fix
Confirm fluid level/condition and check for pressure codes (e.g., P0776). Mild flare within GM's described range may be lived with; pronounced flare warrants inspecting the 3-5-R drum seals and valve-body regulator valve, a valve-body/clutch repair, or in worst cases a rebuild. Fresh fluid/filter and correct operating temperature help; tuners can also raise line pressure to reduce flare.
Sources for this issue (1)
P0700 is not a specific fault by itself — it is an umbrella/MIL-request code the ECM stores whenever the transmission control module (TCM) detects an internal transmission problem and asks the ECM to turn on the check-engine light. On the Silverado 1500 it almost always appears alongside more specific companion codes, and the underlying failure follows two dominant, well-documented patterns depending on the transmission. On trucks with the 6L80 six-speed automatic (many 5.3L and 6.2L V8 trucks, plus 2014-onward 4.3L V6 trucks; 2015-onward 6.2L trucks use the 8L90 eight-speed instead), the internal TEHCM (Transmission Electro-Hydraulic Control Module — GM's combined valve body, solenoids, pressure switches, and TCM in a single pan-mounted unit) develops internal circuit-board/solenoid faults from heat and fluid degradation, throwing P0700 together with codes like P0796, P0777, P0842, or P0973 and dropping the truck into limp mode. On older/base trucks with the 4L60E four-speed (2007-2013 4.3L/4.8L), the same P0700 is typically triggered by a failed shift solenoid (P0753/P0758) or a faulty internal mode switch. Because P0700 is a stored 'passenger' code, a scan tool that can talk to the TCM (not just a basic reader) is required to pull the specific sub-code that identifies the actual failed component.
Common Symptoms
- Check engine light on with P0700 stored
- Transmission stuck in limp mode / limited to one gear (often 3rd or 5th)
- Harsh or delayed shifts
- Transmission fails to shift or slips
- Torque converter clutch not locking up / shudder
- No movement or won't shift out of park in severe cases
How to Fix
Do NOT replace parts off the P0700 alone. Use a bidirectional/TCM-capable scan tool to read the companion codes stored in the transmission controller and verify transmission fluid level and condition first (low or burnt DEXRON-VI fluid alone can trigger the chain). For 6L80 trucks, a failed internal TEHCM is confirmed by multiple simultaneous solenoid/pressure codes; the fix is to drop the pan and replace the TEHCM, which MUST then be programmed to the vehicle's VIN with GM calibration files before the truck will start or shift correctly (ordering the OEM unit by the last 8 VIN digits can yield a plug-and-play unit needing no fast-adapt relearn). For 4L60E trucks, replace the specific failed shift solenoid or internal mode switch identified by the sub-code. Repair the wiring/connectors to the TCM if corrosion is found.
Sources for this issue (4)
P0796 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 P0796 mean on a Chevrolet?
P0796 stands for "Pressure Control Solenoid 'C' Performance or Stuck Off." This generic transmission code means the TCM/PCM detected that pressure control solenoid 'C' is not regulating hydraulic pressure as expected, or appears stuck in the off position. These solenoids control the line pressure that applies the transmission's clutch packs to achieve the correct gear ratios, so a performance fault here disrupts shift quality. Symptoms can include harsh or delayed shifts, slipping, or limp mode, and continued driving can accelerate transmission wear. On Chevrolet it is documented across 2 models: Camaro, Silverado 1500.
What are the most common causes of P0796?
The most common causes of P0796 are: Faulty pressure control solenoid C, Low, dirty, or degraded transmission fluid, Blocked or restricted valve body fluid passages, Damaged wiring or connector to the solenoid, Worn valve body or stuck valve, Internal transmission mechanical wear, Faulty TCM/PCM (rare). The specific cause varies by vehicle.
How much does it cost to fix P0796 on a Chevrolet?
Published repair estimates on Chevrolet range from $150 to $1,800 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.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.