05 Grand Prix Temp Gauge

Asked by GuruLDV74 Mar 21, 2019 at 11:23 AM about the 2005 Pontiac Grand Prix Base

Question type: Maintenance & Repair

I have an 05 Pontiac grand prix.  Temp
gauge was randomly dropping off to
nothing while driving.  Had a new
thermostat about 6 months ago, just
changed temperature coolant sensor.  
Works fine for a day or so then
randomly drops off.  When it drops off
if I shut the car off then it usually wont
start again for about 20 mins until the
car cools down again.  Shop is telling
me I need a new PCM module....any
other suggestions?  I was wondering
about changing thermostat again?  
Also blower fan suddenly stopped
blowing heat into the car....still makes
heat as the car warms up it's just that I
cant get it to blow into the car.  Hubby
works out of town and I am trying to fix
this myself so I dont have a HUGE shop
bill....any help greatly appreciated!

1 Answer
18,685

munron answered 5 years ago

If the car is overheating I'd check that the cooling system is actually full and that there is no air trapped in the system. There is a bleeder valve by the thermostat that can be used to release trapped air. It can be tricky to get the air out though. As for the fan, did it gradually quit, first loosing the lower speeds before stopping entirely. If so, its the resistor in the air duct inside the car. Of course in both cases above it could be other things. Spend money on diagnostics first if you have to before you start replacing things. It's unlikely that its the thermostat if you just replaced it.

Mark helpful

Your Answer:

Related Questions

  • 05 Grand Prix Temp Gauge 1 Answer

    I have an 05 Pontiac grand prix. Temp gauge was randomly dropping off to nothing while driving. Had a new thermostat about 6 months ago, just changed temperature coolant sensor. Works fine for...

    2005 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • 05 Grand Prix Temp Sensor Off and Rough Warm Start 2 Answers

    05 3.8, 160000 miles. After sitting for an especially cold 4 day weekend, it started a little rough (understandable) and then when I stopped for gas it wouldn’t start again without giving it gas. A...

    2005 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • 05 grand prix gtp transmission fluid change 2 Answers

    How do I change my trans fluid on my 05 grand prix gtp

    2005 Pontiac Grand Prix GTP

    -

    Maintenance & Repair

  • Temp question 98 grand prix 17 Answers

    I have a 98 Grand Prix that I replaced the engine with one from a 2001 buick regal. I put in a new 160 fail safe thermostat. When driving non stop, the temp gauge barely moves, but if I drive in sto...

    1998 Pontiac Grand Prix 2 Dr GT Coupe

    -

    Maintenance & Repair

  • 05 Pontiac Grand Prix 1 Answer

    I have an 05 pontiac grand prix base (3.8 v6) and the engine just went bad on me. Wanted to know if id be able to swap it to an 05 Gtp engine. Would their be extra work other than reprogramming the...

    2005 Pontiac Grand Prix Base

    -

    Maintenance & Repair

Shortcuts

Search Pontiac Grand Prix Questions

CarGurus Experts

  • #1
    munron
    Reputation
    8,220
  • #2
    James Sparrow
    Reputation
    7,520
  • #3
    Dorian Hendricks
    Reputation
    6,170
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Pontiac GTO
5 listings
Used Chevrolet Corvette
29 Great Deals out of 1,060 listings starting at $15,871
Used Ford Mustang
65 Great Deals out of 1,259 listings starting at $4,995
Used Pontiac G6
21 listings
Used Chevrolet Impala
9 Great Deals out of 107 listings starting at $4,632
Used Pontiac Grand Am
3 listings
Used Dodge Charger
38 Great Deals out of 645 listings starting at $4,888
Used Chevrolet Monte Carlo
7 listings starting at $3,000
Used Chrysler 300
34 Great Deals out of 516 listings starting at $4,999
Used Chevrolet Tahoe
24 Great Deals out of 911 listings starting at $11,900

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. Content will be removed if CarGurus becomes aware that it violates our policies.