Pontiac g5

Asked by Guru568BV Feb 04, 2018 at 04:08 PM about the 2008 Pontiac G5 Base

Question type: Maintenance & Repair

Sometimes when I’m going 35-45 mph my rpms
flutter between 1500 and 2000. No lights are on so
there’s no code. Any idea what it could be?

6 Answers


What's the battery voltage ?? what's the alternator putting out when the engine running ?? It should be about 14 1/2 volts Sounds like a low voltage issue to me What's the fuel pressure ??

1 people found this helpful.

Olds403: I don’t know. I just got the car the other day, the only gauges it has are speedometer, trachometor and the gas gauge.


You could buy a cheap multi-tester for less than 10 bucks and their really use full not only for DC voltage but for AC current plus reading Ohm's also


If it is an automatic trans, it may be dropping into a lower gear. Do you notice it more on uphill grades or under an abnormal load? 500 RPM's is a large jump but your trans might be getting a signal to change gears to keep up your speed in that range.

1 people found this helpful.

It’s usually up hill or right as I come off a hill. Checked trans fluid and that was fine. Put plugs in it just to see if it would help, figured it couldn’t hurt. That didn’t do anything. Mechanic said that’s just how some of these models do

Your Answer:


Looking for a Used G5 in your area?

CarGurus has 74 nationwide G5 listings starting at $5,999.

Postal Code:

Pontiac G5 Experts

  • #1
  • #2
    Michael Coll
  • #3
View All

Find great deals from top-rated dealers


Related Models For Sale

Used Pontiac G6
70 listings starting at $1,995
Used Pontiac G8
4 listings starting at $5,795
Used Honda Civic
115 Great Deals out of 8,205 listings starting at $850
Used Chevrolet Cobalt
135 listings starting at $550
Used Honda CR-V
69 Great Deals out of 5,127 listings starting at $3,000
Used Toyota Corolla
187 Great Deals out of 7,126 listings starting at $988
Used Pontiac Solstice
22 listings starting at $8,995
Used Pontiac Grand Prix
19 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. Content will be removed if CarGurus becomes aware that it violates our policies.