One Stop Solutions 99142 HVAC Heater Core

Heater Core for Buick Lucerne and Cadillac DTS

Restore cabin heat with this HVAC heater core from One Stop Solutions. Part number 99142 is built as a direct replacement for OE-style fitment in select 2006-2011 Buick Lucerne and Cadillac DTS applications, with aluminum construction and pressure testing for added confidence.

Key Features

• OE-form and OE-function replacement heater core
• Premium aluminum construction
• Cadmium-plated tubes inside and out to resist premature failure
• Individually pressure tested before release
• Foam and related accessories included with the unit
• Direct replacement for copper-designed heater core applications

Product Details

One Stop Solutions 99142 is an HVAC heater core designed for vehicles that use a copper-style OE core but require an aluminum replacement. It is engineered for select Buick Lucerne and Cadillac DTS models, including Fits 2006-2011 Buick Lucerne and Fits 2006-2011 Cadillac DTS. This part cross-references APDI 9010522 and Dorman - HELP 99361 for the same application.

Common Repair Symptoms

• Weak or no heat from the vents
• Coolant odor inside the cabin
• Fogging or film on the windshield from heater core leakage
• Coolant loss with no visible external leak
• Uneven heater performance in Buick Lucerne or Cadillac DTS vehicles

Installation Notes

Verify the vehicle’s HVAC configuration and compare the original core before installation. Flush the cooling system if contamination is present, and inspect hoses, seals, and the heater control system while the dash components are accessible. Confirm fitment by year and model before ordering; this part number is 99142.

Quality Assurance

Each heater core is individually pressure tested. The aluminum core construction and plated tubes are used to help reduce early failure in demanding HVAC service conditions.