2001-2010 & 2017–2023 Duramax L5P Failed Coolant Bottle Sensor Fooler

Keep your Duramax running strong without unnecessary warnings. This Duramax L5P Coolant Bottle Sensor Fooler is engineered to eliminate false low-coolant warnings caused by a failed or flaky coolant reservoir level sensor — a common issue on 2017–2025 L5P trucks.

Key Features

• Direct plug-and-play design — installs easily in place of the factory reservoir sensor with no cutting, splicing, or redesigning wiring harnesses.

• Reliable signal emulation — mimics the factory sensor’s resistance range so the ECM reads a healthy coolant level even when the original sensor fails.

• Prevents nuisance CELs — stops annoying dashboard alerts and limp-down conditions tied to the coolant bottle sensor.

• Built for L5P trucks — specifically calibrated for the 2017–2026 Duramax (L5P) engine platform.

• Durable and dependable — built to withstand under-hood heat, vibration, and exposure common in diesel work environments.

Why You Need It
Failed coolant bottle sensors are a known weak point on L5P Duramax trucks. When they glitch, the truck can throw a code and trigger warnings even when coolant levels are fine. This fooler gives the ECM a clean, stable signal — eliminating false alarms so you can stay focused on the road or the job.

Compatibility
✔ Fits all 2017–2025 GM 6.6L Duramax L5P equipped with the stock coolant reservoir level sensor
✔ Ideal for performance builds, race trucks, tow rigs, and daily drivers

What’s Included

• 1x Coolant Bottle Sensor Fooler
  

Quick Install Tip: No special tools required — swap it in in minutes and clear any stored codes with your scan tool.