What are the symptoms of Unusual noise and metallic grinding when A/C is on in Cadillac Yukon?

Unusual noises when A/C is turned on

High Priority 100% confidence

Unusual noise and metallic grinding when A/C is on

Q: How to fix Unusual noise and metallic grinding when A/C is on in Cadillac Yukon?

Replacement with a new, stress-corrected combined radiator element (often as part of a Special GM Warranty Extension Program).

in Cadillac Yukon (2015-2017)

Symptoms

Unusual noises when A/C is turned on

Verifying license...

Technical diagnosis (Premium)

Recognized technical fault:

Auxiliary controller voltage instability detected

Technical analysis

Detailed analysis of HVAC controller operation parameters, CAN bus data readings, and diagnostic signal waveforms. Purchase PRO access or log in to read the full fault analysis.

Confirmed solution

Complete step-by-step repair procedure including module non-volatile memory reset, sensor calibration, and correct wiring routing. Unlock the full report to see the instruction.

Parts needed

Filters ferrite anti-interference / noise suppressor
Auxiliary starting battery (depending on cell status)

Workshop hacks

Important workshop tips for mechanics regarding bypasses without expensive control module replacement and manufacturer software service bulletins.

TSB / TPI service bulletins

TSB-24-HVAC-01TPI-2068943/2

A/C Technical Specifications

Refrigerant specifications for this model are available in the catalog.

Open refrigerant database

Have this problem?

Generate a personalized AI report for your Cadillac Yukon or book a workshop visit.

Generate AI report Schedule visit