P3075 on GMC: How to Diagnose & Fix
Engine Coolant Pump Low Current Performance
1 GMC model · 1 documented issue · 1 critical · $250-$550 repair
P3075 on GMC by model: symptoms, diagnosis and fix
2023-2026 GMC Canyon trucks with the L3B 2.7L turbocharged four-cylinder use plastic quick-connect fittings at the radiator hose ends. The seal at the upper radiator hose quick connector can fail relatively early in service, allowing a slow coolant leak. Low coolant leads to elevated running temperature, reduced engine performance or limp mode, and in a neglected case sudden shutdown and engine damage. GM issued Service Bulletin PIT6494A in March 2026 addressing upper radiator hose quick-connect seal failure on the Colorado and Canyon, but the bulletin only applies while the truck is inside the 3-year/36,000-mile bumper-to-bumper warranty. A class action (Dixon v. GM, filed 2026) alleges the defect - the named plaintiff's truck logged DTC P3075 with low coolant from a leak at the quick-connect end of the upper radiator hose at about 44,400 miles and was charged $489.36 out of pocket. The same connector family is alleged on the 2.5L LK0 Traverse/Acadia/Enclave, but on the Canyon the affected engine is the 2.7L L3B.
Common Symptoms
- Low coolant warning message
- Visible coolant seepage or crust at the upper radiator hose connector
- Coolant smell after shutdown / puddle under the front of the truck
- Rising coolant temperature or overheat warning
- Reduced engine power / limp mode
How to Fix
Have the dealer perform the repair in Service Bulletin PIT6494A - replace the upper radiator hose assembly with the revised quick-connect/seal, pressure test the cooling system and refill with DEX-COOL. It is covered free under the 3/36,000 bumper-to-bumper warranty; outside that window owners have generally been charged roughly $250-550. There is no safety recall for this - do not wait for one. Check the coolant surge tank level monthly on these trucks; a low-coolant message or a sweet smell after shutdown should be diagnosed immediately, because continued driving on low coolant is what converts a $400 hose into an engine repair.
Sources for this issue (3)
P3075 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 P3075 mean on a GMC?
P3075 stands for "Engine Coolant Pump Low Current Performance." General Motors powertrain code. On engines with an electrically driven or electrically assisted coolant pump, the ECM monitors the current the pump draws as a proxy for how much coolant it is actually moving. P3075 sets when engine coolant pump current falls outside its calibrated range for more than about three seconds — the pump is drawing too little current, which means it is not moving the expected volume of coolant. GM describes the resulting condition as engine coolant flow too low; the pump is often working correctly and the real problem is that it has nothing solid to pump, because the system has lost coolant or has air in it. On GMC it is documented across 1 model: Canyon.
What are the most common causes of P3075?
The most common causes of P3075 are: Low coolant level from an external leak, Air trapped in the cooling system after a coolant service or a leak, letting the pump cavitate, Leaking plastic coolant control valve / integrated water pump assembly or its housing — a known failure point on GM 1.2L/1.3L/2.7L engines, Leaking radiator hose connection, thermostat housing or radiator, Electrical fault in the coolant pump circuit — wiring, connector or failed pump motor, Stuck coolant control valve or restricted coolant passage, Faulty ECM (rare). The specific cause varies by vehicle.
How much does it cost to fix P3075 on a GMC?
Published repair estimates on GMC range from $250 to $550 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 P3075 on a different make?
View P3075 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.