Pontiac Grand Prix Forums : Grandprix
 

Grand Prix Forums is the premier Pontiac Forum on the internet. Registered Users do not see the above ads. Please Register - It's Free!

Pontiac Grand Prix Forum - Welcome Register today! Contact us!

Results 1 to 4 of 4
  1. #1
    SE Level Member QueenCognac's Avatar
    Join Date
    Jan 2017
    Location
    Georgia
    Posts
    1
    Chats
    0

    Default 02 GP 3.1l Temp guage fluctuating???

    Hi all....newbie here!

    Anyone able to tell me if this issue is a thermostat or the sensor? My 02 GP 3.1l temp guage started fluctuating a lot and heat would work then not work...after 2 days now the heat is completely gone amd guage is still fluctuating?? I figure its the thermostat however possibly the sensor...anyone have a better suggestion as i am having to fix this on my own?

    Sent from my LGMS330 using Tapatalk

  2. #2
    Killa Bee Scottydoggs's Avatar
    Join Date
    Aug 2010
    Location
    new jersey
    Posts
    36,783
    Chats
    147603

    Default Re: 02 GP 3.1l Temp guage fluctuating???

    fill the radiator, if its full, flush your heater core.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW

  3. #3
    GTP Level Member cheatah faheatah's Avatar
    Join Date
    May 2016
    Location
    Rouge Island
    Posts
    613
    Chats
    1855

    Default Re: 02 GP 3.1l Temp guage fluctuating???

    Why you need heat for in Georgia? lol
    not what it looks like

  4. #4
    SE Level Member
    Join Date
    Nov 2016
    Location
    Oregon
    Posts
    64
    Chats
    0

    Default Re: 02 GP 3.1l Temp guage fluctuating???

    A combined gauge AND heat issue would never be a sensor. Anytime I have a gauge reading weird I always check my heat for confirmation. Check coolant. If it's fine then I would replace thermo. If u need coolant then find out why you do. Haven't checked in a year? Leaky hose? Possible head gasket?

Similar Threads

  1. Fluctuating Coolant Temp
    By Mekaiyo in forum General Grand Prix Discussion
    Replies: 15
    Last Post: 02-26-2016, 04:38 PM
  2. Temp fluctuating
    By Kabledog in forum 3.1L V6 (LHO/LG8)
    Replies: 19
    Last Post: 12-21-2015, 07:11 AM
  3. Engine Coolant Temp Fluctuating
    By webracin in forum How To Write-Ups/Tech Tips
    Replies: 40
    Last Post: 07-29-2013, 04:33 PM
  4. Fluctuating Coolant Temp
    By Burbman in forum 3.8L V6 Naturally Aspirated (L36)(L26)
    Replies: 15
    Last Post: 09-25-2012, 06:42 AM
  5. 94 GP with fluctuating temp gauge
    By Beyond Hope in forum 3.1L V6 (LHO/LG8)
    Replies: 2
    Last Post: 07-22-2010, 09:19 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •