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2012
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Rough Idle or Engine Misfire

Expert diagnosis and repair solutions for 2012 Chevrolet Silverado Rough Idle or Engine Misfire. Get step-by-step fixes, cost estimates, and professional advice.

Expert Repair Solutions

1
medium$150-$300
Replace faulty ignition coils to resolve misfire issues, particularly if specific cylinders are affected.
Source: https://www.silveradosierra.com/threads/p0300-random-multiple-cylinder-misfire-detected-and-rough-idle.756710/

Repair Steps:

  1. Identify misfiring cylinder using diagnostic tools
  2. Swap ignition coil with a known good one to confirm fault
  3. Replace faulty ignition coil with a new unit
2
medium$100-$250
Inspect and repair vacuum leaks which can cause rough idle and misfire.
Source: https://repairpal.com/chevrolet/silverado-1500/2012/rough-idle

Repair Steps:

  1. Perform a smoke test to identify vacuum leaks
  2. Inspect vacuum hoses and intake manifold for cracks or disconnections
  3. Replace or repair damaged vacuum components
3
hard$200-$500
Clean or replace fuel injectors to address misfire and rough idle.
Source: https://www.duramaxforum.com/threads/2012-silverado-5-3l-p0307-looking-for-experience.1026775/

Repair Steps:

  1. Use a fuel injector cleaning kit to clean injectors
  2. If cleaning does not resolve the issue, replace faulty injectors
  3. Reassemble and test for improvement in engine performance
4
easyFree at dealer
Address potential issues with the ignition system as per Recall Campaign 14V827000.
Source: https://www.nhtsa.gov/recalls?nhtsaId=14V827000

Repair Steps:

  1. Contact Chevrolet dealer to verify recall status
  2. Schedule an appointment for inspection and repair
  3. Have the ignition lock housing inspected and replaced if necessary
5
medium$50-$100
Perform engine oil change and inspect for oil fouling due to AFM system issues.
Source: https://www.gm-trucks.com/forums/topic/204412-rough-idle-and-engine-misfire-issue/

Repair Steps:

  1. Drain old engine oil and replace with recommended oil type
  2. Inspect spark plugs for oil fouling and replace if necessary
  3. Consider disabling AFM if persistent oil fouling occurs

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