P0354 on GMC Sierra 1500
Factory diagnostic protocol and troubleshooting wire for fault code P0354 specifically for the GMC Sierra 1500 (2020–2026, 5.3L / 6.2L EcoTec3 V8 (Denali 420HP) / 3.0L Duramax Turbo-Diesel).
1. Symptoms of P0354 on GMC Sierra 1500
When the Engine Control Module (ECM/PCM) on your GMC Sierra 1500 (5.3L / 6.2L EcoTec3 V8 (Denali 420HP) / 3.0L Duramax Turbo-Diesel) logs fault code P0354, drivers commonly observe:
2. Most Likely Causes on GMC Sierra 1500
Historical warranty claims and technical repair bulletins for GMC Sierra 1500 point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for GMC Sierra 1500
Swap Coil 4 to Cylinder 1. on the GMC Sierra 1500 equipped with 5.3L / 6.2L EcoTec3 V8 (Denali 420HP) / 3.0L Duramax Turbo-Diesel.
Install new OEM coil pack. on the GMC Sierra 1500 equipped with 5.3L / 6.2L EcoTec3 V8 (Denali 420HP) / 3.0L Duramax Turbo-Diesel.
Clear memory and road test. on the GMC Sierra 1500 equipped with 5.3L / 6.2L EcoTec3 V8 (Denali 420HP) / 3.0L Duramax Turbo-Diesel.
Equipment for Diagnosing GMC Sierra 1500 (P0354)
Direct-Fit Laser Iridium Spark Plugs (Set of 4/6)
Pre-gapped iridium spark plugs engineered to restore smooth combustion on GMC Sierra 1500.
Magnetic Swivel Spark Plug Socket Set
360-degree magnetic swivel socket prevents ceramic plug cracks inside deep engine spark wells.
BlueDriver Bluetooth Pro OBDII Scan Tool
Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.
Other Common Fault Codes on GMC Sierra 1500
Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the GMC Sierra 1500:
4. GMC Sierra 1500 P0354 FAQs
What causes code P0354 to trigger on a GMC Sierra 1500?
On the GMC Sierra 1500 (5.3L / 6.2L EcoTec3 V8 (Denali 420HP) / 3.0L Duramax Turbo-Diesel), P0354 is most frequently caused by Dead Cylinder 4 ignition coil or Wiring damage.
Where is the OBD-II port located on my GMC Sierra 1500?
On the GMC Sierra 1500, the 16-pin DLC diagnostic connector is located Under driver dashboard, left of steering column. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.
Can I safely drive my GMC Sierra 1500 with code P0354?
No. Cylinder 4 ignition coil has failed. Given that P0354 carries a Critical severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.