I changed the thermostat and water pump in my 08 grand Prix and now the temperature guage goes down when I drive and returbs to normal when stopped.I have bled the bsystem what else could it be?Bad thermostat?

Asked by Dec 03, 2014 at 03:22 PM about the 2008 Pontiac Grand Prix Base

Question type: Maintenance & Repair

3 Answers

Not running hot at all.When I drive it goes completely to the bottom and have no heat.When I stop it goes up to normal and the heat will then blow

5,215

It certainly sounds like the sending unit to me. I had a sending unit go out on a Ford and most of the time the gauge said the engine was running dangerously cold, but I knew it was just the sending unit. I put a new sending unit in, and now the gauge says it runs in the middle of the range in every day and higher in stop and go. The picture is from Rockauto.com parts website where the sending units go from $7.63 to $16.95 plus shipping.

3,865

The sending unit only helps measure heat. It does not create it or remove it so if the car is running so cold that the heat stops blowing it is definitely not a sending unit. It could be a thermostat stuck wide open so I would take a second look at it to make sure it is working and is installed correctly.

Your Answer

Add photo

Related Questions

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,857 nationwide Grand Prix listings starting at $1,500.

ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 4,160
#2 Tom Demyan
Tom Demyan
Reputation 2,830
#3 munron
munron
Reputation 2,180
View All

Related Models For Sale

Used Chevrolet Impala
578 Great Deals out of 31,559 listings starting at $799
Used Dodge Charger
397 Great Deals out of 28,096 listings starting at $1,988
Used Pontiac G8
24 Great Deals out of 373 listings starting at $6,500
Used Chevrolet Monte Carlo
20 Great Deals out of 1,404 listings starting at $1,995
Used Pontiac G6
78 Great Deals out of 4,080 listings starting at $699
Used Ford Mustang
456 Great Deals out of 45,641 listings starting at $1,999
Used Chevrolet Malibu
909 Great Deals out of 79,545 listings starting at $1,500
Used Chrysler 300
401 Great Deals out of 19,882 listings starting at $1,000
Used Dodge Challenger
169 Great Deals out of 24,123 listings starting at $8,500
Used Honda Accord
803 Great Deals out of 84,448 listings starting at $988
Used Ford Taurus
234 Great Deals out of 20,408 listings starting at $2,258

Used Cars For Sale

2008 Pontiac Grand Prix Base For Sale
17 Great Deals out of 368 listings starting at $1,500

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.