2.8L Duramax Crank No Start Diagnosis | Broken Reluctor Ring (Code P0336)

🧰 Description

If your 2.8L Duramax cranks but won’t start and sets code P0336, you may be dealing with a failed crankshaft reluctor ring (also called the exciter ring) — a very common issue on these engines.

In this video, we focus only on the diagnosis, showing how to identify a broken or slipped reluctor ring before tearing the engine apart. This is the critical first step that saves time, money, and unnecessary parts replacement.

You’ll learn:

What the crankshaft reluctor (exciter) ring does

Why failure causes a crank-no-start condition

How code P0336 points to this issue

Scan tool data and checks used to confirm the failure

How to be confident in the diagnosis before repair

This diagnostic process applies to all GM vehicles equipped with the 2.8L Duramax, including:

2016–2022 Chevy Colorado 2.8L Duramax

2016–2022 GMC Canyon 2.8L Duramax

Other global GM applications using the same engine

🧩 Common Symptoms: Crank no start, intermittent stall, no RPM signal, check engine light
⚙️ Common Code: P0336 – Crankshaft Position Sensor Performance

👉 A separate repair video covering the full reluctor ring replacement will be coming next.
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Content:
0:00 Intro
1:02 Inspecting Crank Sensor Harness
1:53 Removing Crank Sensor
4:42 Checking Exciter Wheel

Видео 2.8L Duramax Crank No Start Diagnosis | Broken Reluctor Ring (Code P0336) канала Green Castle Garage