Trouble codes › By vehicle › Chevrolet Silverado 1500
Common check-engine codes on the Chevrolet Silverado 1500
2007-2023
The second most common vehicle on US roads. The 5.3L and 6.2L V8s (and the 4.8L in older trucks) share most of their common codes with the GMC Sierra, Tahoe and Suburban: misfires, oil pressure sensor faults, EVAP and throttle codes.
Most common: P0300, P0521, P0171, P2135, P0449, P0442, P0700.
Known problems on the Chevrolet Silverado 1500
- GM V8 oil pressure sensor and screen (P0521) (P0521, P0520, P0524)
- GM V8 AFM/DFM lifter failure (P0300, P0301, P0302, P0303)
P0300 Random/Multiple Cylinder Misfire Detected
P0300 means the engine is misfiring in more than one cylinder, often from worn plugs or coils, a vacuum leak or low fuel pressure.
On the Chevrolet Silverado 1500: Misfires, often on a specific cylinder (P0301-P0308). On 5.3L and 6.2L V8s with Active Fuel Management or Dynamic Fuel Management, a collapsed or stuck lifter is a well-known cause and usually comes with a ticking noise; that's a bigger repair than plugs or coils. Rule out plugs, wires and coils first.
P0300: causes, can I keep driving, and what to check first →
P0521 Engine Oil Pressure Sensor/Switch "A" Range/Performance
P0521 means the oil pressure reading doesn't make sense for how the engine is running; check the oil level and have real pressure tested.
On the Chevrolet Silverado 1500: A very common GM V8 code: the oil pressure sensor reads wrong, and a small filter screen under the sensor can clog with sludge and cause a false low or zero reading. Replace the screen with the sensor, check the oil level and condition, and confirm real pressure with a mechanical gauge before assuming it's only the sensor.
P0521: causes, can I keep driving, and what to check first →
P0171 System Too Lean (Bank 1)
P0171 means bank 1 is running lean (too much air or too little fuel), most often from a vacuum leak or a dirty MAF sensor.
On the Chevrolet Silverado 1500: Lean codes, often with P0174: intake manifold gasket leaks on older 4.8L and 5.3L engines, a dirty MAF sensor, or a vacuum leak.
P0171: causes, can I keep driving, and what to check first →
P2135 Throttle/Pedal Position Sensor/Switch "A"/"B" Voltage Correlation
P2135 means the two throttle position sensors disagree, so the engine computer limits power; usually a failing throttle body.
On the Chevrolet Silverado 1500: Throttle position correlation is a known GM problem: often a failing throttle body or a corroded connector at the throttle body, sometimes with reduced power.
P2135: causes, can I keep driving, and what to check first →
P0449 Evaporative Emission System Vent Valve/Solenoid Circuit
P0449 means there's an electrical fault in the EVAP vent valve circuit.
On the Chevrolet Silverado 1500: EVAP vent solenoid faults (P0449, P0446) are common on GM trucks: the vent valve near the fuel tank gets dirt and water in it and sticks.
P0449: causes, can I keep driving, and what to check first →
P0442 Evaporative Emission System Leak Detected (Small Leak)
P0442 means the EVAP system has a small leak, often a worn gas cap seal or a cracked hose.
On the Chevrolet Silverado 1500: Small EVAP leaks: check the gas cap first, then the vent valve and hoses near the tank.
P0442: causes, can I keep driving, and what to check first →
P0700 Transmission Control System (MIL Request)
P0700 means the transmission computer has stored its own fault code; read the transmission codes to find the real problem.
On the Chevrolet Silverado 1500: A transmission fault flag on the 6-speed and later 8-speed automatics; read the transmission codes. The 8-speed is also known for shudder at low speeds, which GM addressed with fluid changes in service bulletins.
P0700: causes, can I keep driving, and what to check first →
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Common codes and known problems as widely reported for these model years; your vehicle may differ. Check nhtsa.gov/recalls and ask a dealer about service bulletins for your VIN, and confirm in your service information.