I have a 2002 Bonneville and my heaT blows luke warm air not hot .. it will heat up if driving and go on thruway but not when just sitting and running any suggestions????

Asked by Nov 25, 2016 at 01:05 PM about the 2002 Pontiac Bonneville

Question type: Maintenance & Repair

1 Answer

36,025

Check the coolant level. If it's low, not enough coolant can circulate to the heater core. You can also check the heater hoses when the engine is running and up to temperature, squeeze them and see if they are hot and feel pressurized. If not coolant is not flowing to the core, which indicates either low coolant levels, a bad thermostat not opening, or a failing water pump. Based on your description though, my bet is on a bad water pump.

Your Answer:

Pontiac Bonneville Experts

  • #1
    ticklemedaly
    Reputation
    400
  • #2
    Js08016
    Reputation
    380
  • #2
    dandyoun
    Reputation
    380
View All

Related Models For Sale

Used Pontiac Grand Prix
45 listings starting at $3,999
Used Chevrolet Impala
17 Great Deals out of 1,055 listings starting at $2,995
Used Pontiac Firebird
14 listings starting at $8,950
Used Chevrolet Camaro
8 Great Deals out of 1,023 listings starting at $4,500
Used Ford Mustang
21 Great Deals out of 1,308 listings starting at $2,995
Used Chevrolet Monte Carlo
16 listings starting at $4,989
Used Chevrolet Malibu
48 Great Deals out of 1,961 listings starting at $995
Used Buick Regal
4 Great Deals out of 165 listings starting at $6,989
Used Pontiac Grand Am
29 listings
Used Buick LeSabre
9 listings

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.