GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Monte Carlo 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Cold Drafts on Floor

Problem

Action

A partially open air inlet valve.
    • The air inlet valve should close properly in all modes except A/C air conditioning mode.
    • Make repairs as necessary.

The side door seals are damaged or missing.
  1. Inspect all of the door seals.
  2. Repair or replace faulty seals as necessary.