P0301 on a Chevrolet Silverado 1500
P0301 means cylinder 1 Misfire Detected. On the Silverado 1500, a few causes come up far more than others.
What P0301 usually means on a Silverado 1500
P0301 isolates the misfire to cylinder 1, and on the AFM 5.3L Silverado that detail matters, because cylinder 1 is one of the four cylinders that deactivates under Active Fuel Management. A hard misfire on cylinder 1 with a ticking noise points toward a collapsed AFM lifter on that cylinder rather than a simple ignition part. On non-AFM engines or milder cases, it is more likely that cylinder's coil, plug, or injector. The presence or absence of a lifter tick is the key branch in the diagnosis.
Most common causes on the Silverado 1500
- Collapsed AFM lifter on cylinder 1 (5.3L)
Cylinder 1 is an AFM cylinder, so a hard misfire there with a tick is a prime AFM-lifter suspect. This is internal mechanical failure, not an ignition issue.
- Failed coil or worn plug on cylinder 1
The ordinary single-cylinder misfire cause. Swap the coil to another cylinder to see if the misfire follows, and inspect the plug for fouling or wear.
- Oil-fouled plug from AFM oil consumption
On oil-consuming 5.3L engines, cylinder 1's plug can foul from burnt oil, misfiring until the consumption is addressed.
- Injector or compression issue on cylinder 1
A leaking injector or low compression (including a lifter that has damaged the cam lobe) produces a misfire that ignition parts will not cure; test compression to confirm.
What P0301 costs to fix on a Silverado 1500
If cylinder 1 just needs a coil and plug, it is an inexpensive fix. If it is a collapsed AFM lifter, you are into intake and valvetrain teardown, a four-figure job, and it is worth inspecting the camshaft lobe for that cylinder since a failed lifter can score it. Determining lifter versus ignition before disassembly is what protects your wallet.
Fixing it
Listen for a tick and check compression on cylinder 1 before buying ignition parts. If the coil and plug test fine and the cylinder is an AFM cylinder with a tick, plan for lifter work and inspect the cam lobe.
For the full step-by-step diagnosis order (any vehicle), see the main P0301 guide.
Year, engine and mileage change the answer. Start a case and Redline weighs these causes against what your car shows, then names the check that would settle it.
Other codes on the Chevrolet Silverado 1500
Related symptoms
Chevrolet Silverado 1500 problems & recalls by year
Based on widely reported patterns for this model; individual causes vary by year, engine and history. Generic P0301 behavior is covered on the main P0301 page. Confirm with a scan tool before buying parts.
P0301 on your Silverado 1500?
Every problem becomes a Case. Tell Redline what your Silverado 1500 is doing: it shows what the evidence supports, what’s still missing, and what to check next, before you approve a repair.
“Inner pad ~1 mm. Outer pad 3 mm.”
Next: check the slide pins move freely before buying parts.