Coolant Leak Under Truck, Malfunction Indicator Lamp (MIL) Illuminated - DTC P2C48 Set - 2020-2022 Chevrolet Silverado & GMC Sierra 2500HD/3500HD

NHTSA ID Number: 10205584

Manufacturer Communication Number: 21NA265

Summary

This technical bulletin provides a procedure to re-route the coolant hose away from the front prop shaft to avoid contact.

12 Affected Products

Vehicles

Condition

Some customers may comment on one or more of the following conditions:

Some technicians may find DTC P2C48 set in the Engine Control Module (ECM).

Cause

This condition may be caused by the fuel cooler coolant hose contacting front drive shaft at crossmember.

– Typically can happen when driving through deeper water or snow.

Correction

Follow the procedure below to re-route the coolant hose away from the front drive shaft:

1. Utilizing a 6.5 mm drill size, drill a hole in the transmission crossmember in the approximate location noted in the graphic above.

2. Add retainer or equivalent, onto the hose.

3. Install retainer into the hole in the crossmember.

1 Associated Document

Manufacturer Communications

Bulletin No.: 21-NA-265
Date: November, 2021

https://www.nhtsa.gov/recalls?nhtsaId=10205584

SaleBestseller No. 1

Unsurpassed freeze protection and anti-boil performance outperforms industry standards
Organic acid technology resists rust, scale & corrosion while protecting all cooling system metals (including aluminum)
High-quality additives protect against leaks and won’t harm gaskets, hoses, plastics or original vehicle finish
Pre-mixed orange formula is ready-to-use in a 50/50 ratio with deionized water to protect all modern engine components from winter freezing (-34F) and summer boiling (265F).
5 year/150,000 mile guarantee protects against engine failure caused by freeze-ups or boil-overs

Bestseller No. 2

Unsurpassed freeze protection and anti-boil performance outperforms industry standards
Organic acid technology resists rust, scale & corrosion while protecting all cooling system metals (including aluminum)
High-quality additives protect against leaks and won’t harm gaskets, hoses, plastics or original vehicle finish
Orange concentrate formula should be mixed with clean tap water or demineralized water at 50/50 ratio for temperatures -34 to 265F; 60/40 for -62 to 270F; and 70/30 for -84 to 267F
5 year/150,000 mile guarantee protects against engine failure caused by freeze-ups or boil-overs

Bestseller No. 3

VERSATILE ENGINE COOLANT: This antifreeze + coolant is designed for use in all GM vehicles 1995 and newer requiring an orange organic acid technology (OAT) coolant. This item contains a bittering agent called Denatonium Benzoate.
PROTECTS ENGINE: This antifreeze + coolant provides protection against rust and corrosion for all cooling system metals, including aluminum
LONG-LASTING COOLANT: This antifreeze + coolant has a service life of up to 10 years/150,000 miles with a complete cooling system flush and fill
BETTER FORMULA: Our antifreeze coolant solution is free of amines, phosphate, borate, nitrite and silicate
EXCELLENT PERFORMANCE: This meets the performance requirements of ASTM D3306, D4985 and GMW3420, GM6277M

Bestseller No. 4

High-performance, universal automotive antifreeze/coolant with extended life
Provides effective, long-term corrosion protection for aluminum, brass, cast iron, steel, solder, and copper
Superior high temperature for aluminum protection, resulting in longer component life
Silicate-free formula maintains good as new heat transfer, and reduces silicate gel formation in use or in storage
Suitable for a 5-year or 150,000 mile service life in automotive applications; up to of 600,000 miles or 12,000 hours in heavy duty applications