P0305 on GMC YUKON — Cylinder 5 Misfire Detected

Q: "What does P0305 mean on a GMC YUKON?"

"P0305 indicates: Cylinder 5 Misfire Detected. This is a ignition system code. 2 GMC YUKON owners have reported this to NHTSA."

Q: "What are the most common causes of P0305 on GMC YUKON?"

"Based on 2 NHTSA reports, the most commonly cited components are: Power Train,Engine, Engine And Engine Cooling. These percentages are based on the component field in owner complaints."

Q: "Is P0305 serious on my GMC YUKON?"

"Of 2 NHTSA reports for this code on GMC YUKON, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my GMC YUKON shows P0305?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P0305 Means on Your GMC YUKON

P0305 is a diagnostic trouble code indicating: Cylinder 5 Misfire Detected. This code relates to the ignition system system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

2 GMC YUKON owners have reported this issue to NHTSA across model years 2011-2024. Most reports come from the 2011, 2024 model years. The most commonly reported component is Power Train,Engine (50.0% of reports).

Real GMC YUKON Owner Reports

Source: NHTSA Complaints Database

"My 5th cylinder exploded. i had a p0305 code for 5th cylinder misfire, took into the dealership and they replaced the coil pack on that cylinder on 10/20/2020 and 01/17/2021 the 5th cylinder exploded cause chunks of metal to be thrown through the side and cause a catastrophic engine failure."

— 2011 GMC YUKON owner · POWER TRAIN,ENGINE · Filed 01/17/2021

"The contact owns a 2024 GMC Yukon XL. While the contact's wife was driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. In addition, the contact's wife noticed an abnormal knocking sound before the engine seized."

— 2024 GMC YUKON owner · ENGINE AND ENGINE COOLING · Filed 11/02/2025

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1

'11

1

'24

Common Causes on GMC YUKON

Based on NHTSA complaint component analysis for this vehicle.

POWER TRAIN,ENGINE 50%

ENGINE and ENGINE COOLING 50%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P0305 mean on a GMC YUKON? ▾

P0305 indicates: Cylinder 5 Misfire Detected. This is a ignition system code. 2 GMC YUKON owners have reported this to NHTSA.

What are the most common causes of P0305 on GMC YUKON? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Power Train,Engine, Engine And Engine Cooling. These percentages are based on the component field in owner complaints.

Is P0305 serious on my GMC YUKON? ▾

Of 2 NHTSA reports for this code on GMC YUKON, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my GMC YUKON shows P0305? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.