2008 Pontiac G8 Pontiac G8 2008

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2008 Pontiac G8 repairs by problem area

Engine (21%)

Transmission and Drivetrain (2%)

Brakes and Traction Control (3%)

Suspension and Steering (37%)

Electrical and Air Conditioning (22%)

Paint, Rust, Leaks, Rattles, and Trim (6%)

Other (8%)

Chart based on 98 repairs.
See TSBs and recalls for the 2008 Pontiac G8.

2008 Pontiac G8 repair cost distribution

$2500+ (4%)

$1000 - $2499 (4%)

$500 - $999 (8%)

$100 - $499 (25%)

< $100 (58%)

Chart based on 72 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
Non-members can see only ten 2008 Pontiac G8 repair histories. Log in or join us to see them all.

2008 Pontiac G8

Engine not specified

Pontiac G8 in Oklahoma, United States
Nov 2008 - Sep 2012
Dec 2008

1000 mi
Bad front right strut bearing. 
Mar 2012

24000 mi

US $3000
Ball joints and tie rod ends wore out 

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2008 Pontiac G8 4dr Sedan

361-horsepower 6.0L V8 6-speed shiftable automatic RWD

Pontiac G8 in Massachusetts, United States
Mar 2011 - May 2014
Jun 2011

28000 mi

US $100
Loose end link, that keeps getting loose. 
Jun 2012

30000 mi

US $200
Broken tie-rod end and control arms are getting loose also. 
Pontiac G8 in Illinois, United States
Sep 2010 - Mar 2017
Apr 2011

17000 mi
Multiplayer CD was not ejecting at #4 and #6. Player was replaced. 
Dec 2011

21000 mi

US $270
Battery not holding a full charge. 
Jul 2015

41000 mi

US $205
Broken hood release cable and hood latch was replaced. 
Pontiac G8 in Ontario, Canada
Jul 2010 - Jul 2012
Apr 2011

26660 mi
Paint flaking from steering wheel trim. Dealer replaced the trim under warranty. Parts arrived in 1 week. 
Nov 2011

33060 mi

C $125
seat trim fell off 
May 2012

35740 mi
Airbag light on after recall program installed 
Jun 2012

37200 mi
Noise in front end ..tech suspected lower control arms 
Pontiac G8 in Illinois, United States
Mar 2008 - Sep 2011
Oct 2009

16000 mi
Defective valve spring replaced. Sounded horrible, like it was having a really hard time running, as if not getting enough air. Even died on me several times (during my troubleshooting, I wasn't driving it after the initial "Check Engine" light came on). Defective valve spring replaced again the next day while visiting family, so second dealer. First dealer had left piece of plastic, approximately 2 in x 1/2 in, underneath the valve spring, causing it to bend and therefore malfunction. 
Nov 2009

17000.0 mi
Valve spring broke, also causing the #7 intake runner to have a leak. Everything was fixed under warranty. 
Pontiac G8 in Michigan, United States
Mar 2011 - Oct 2013
Jul 2011

27000 mi

US $60
Gasket for the axle back system failed causing a severe leak and carbon monoxide(exhaust fumes) could be smelled heavily inside the car when stopped ie warming up, stop light, idling while parked. 
Apr 2012

38700 mi

US $89
Bent front sway bar end links, replaced links 
Oct 2013

59000 mi

US $3500
Catastrophic valve train failure 
Pontiac G8 in Iowa, United States
Dec 2011 - Mar 2017
Jan 2012

63000 mi

US $298
Battery needed replacement. 
Pontiac G8 in Michigan, United States
- Jul 2009
Sep 2008

5896.0 mi
Trans ECU reflash, bulletin #080730036 
Jun 2009

24369.0 mi
Susp: Lf & Rt upper strut mounts failed, replaced. Recalls: TPMS re-flash; brake switch flash. 
Jul 2009

26809.0 mi
Susp: Rt front upper control arm failed, replaced. 
Pontiac G8 in Florida, United States
Oct 2009 - Sep 2013
Jan 2009

5000.0 mi
Warranty repair- Transmission interlock froze, console cover plate replaced after a release pin was pulled by the dealer. Transmission was not able to be taken out of Park but steering was not locked. 
Pontiac G8 in Ohio, United States
May 2015 - Mar 2017
Jul 2016

47500 mi
Control arm & ball joint boot. Repaired under GM special coverage program at no cost. 
Feb 2017

56000.0 mi
Control arm. Repaired under GM special coverage program at no cost. 
Pontiac G8 in Pennsylvania, United States
Jun 2014 - Dec 2016
Apr 2015

95200 mi

US $100
Clunk/knock from front when under 30mph. Replaced sway bar bushings and sway bar end links 
Dec 2015

110000 mi

US $60
Front passenger door lock would not unlock via remote unless button pressed several times. Common G8 problem according to forums. Replaced with new lock mechanism. Rear passenger door lock would not unlock via remote unless button pressed several times. Common G8 problem according to forums. Replaced with new lock mechanism. Rear driver door lock would not unlock via remote unless button pressed several times. Common G8 problem according to forums. Replaced with new lock mechanism. 
Pontiac G8 in Oregon, United States
Mar 2014 - Dec 2015
Nov 2015

84000 mi

US $180
Power Door Locks have been a continual problem in last year - locks are slow and sometimes do not lock, however fuel gate is also tied to door locks (external opening of fuel access gate)which will not open if lock is engaged. 
Pontiac G8 in New York, United States
Sep 2009 - Mar 2017
Nov 2009

8300 mi
Driver's door lock problem, not always locking. 
Mar 2010

10000 mi
Driver's power door lock not properly unlocking Evap leak indicated, check engine light cleared, has not come back in 4 weeks. 
May 2010

10000 mi
door lock actuator replaced 
Jun 2010

11000 mi
replaced fuel cap due to EVAP leak 
Jan 2011

9800 mi
Transmission went into limp mode with MIL illuminated. No problem found after reset. 
Mar 2011

14000 mi
looses antifreeze every 6 months or so, second time needed to refill, no leak found. 
Mar 2014

30000 mi

US $150
Hood release cable broke 
Jul 2014

34200 mi

US $100
sway bar end links replaced. 
Aug 2014

34900 mi

US $700
front tie rods replace, rear set (car has 2 sets per front wheel) 
Aug 2015

45000 mi

US $700
Replaced Lower control arms 
Jun 2016

56000 mi

US $1000
Leak in aluminum line and compressor 
Pontiac G8 in Texas, United States
Nov 2009 - Nov 2013
Jun 2011

47000 mi
Pulled a P0445 and P0449 code. Replaced gas cap for P0455 and replaced EVAP canister/solenoid for P0449. No issues since. 
Pontiac G8 in New York, United States
Aug 2008 - Oct 2010
Aug 2009

8000 mi
car creaked when going over uneven surface. dealer said it was front right bushing which they ordered and call me when in  right rear brake noise-not rotor or brake--metal around rotor bent to stop rubbing 
Feb 2010

13000 mi
all ok-professional dealer, bushing repaired 
Jun 2010

15000 mi
front end noise 
Aug 2010

16200 mi
repaired right control arm last summer--now left control arm-bulletin states to replace front end pieces and align -ordered parts as per dealer 
Pontiac G8 in Ohio, United States
Jul 2008 - Nov 2011
Jun 2009

8000 mi
Engine oil leak. 
Jun 2011

15000 mi
CD player stopped working, fault listed as mechanism error. Dealership reprogrammed and updated software on computer problem fixed. 
Pontiac G8 in South Dakota, United States
Apr 2008 - May 2011
Aug 2008

4000 mi
Hesitation when taking off...fixed with transmission computer flash update. 
Feb 2009

7000 mi
Noticed a rattle in front suspension. Deemed normal by tech.  
Jun 2010

18000 mi
driver's side lower front control arms replaced due to premature wear.  
Pontiac G8 in Michigan, United States
Mar 2008 - May 2009
May 2008

111.0 mi
Trunk remote unlock would not work. ELECTRIC TRUNK RELEASE MAKES STRANGE SOUND WHEN BEING ACTIVATED. MANUAL RELEASE WORKS FINE. 
Pontiac G8 in California, United States
Mar 2008 - Sep 2014
May 2012

33000 mi

US $100
Passenger from door handle needed to be replaced under warranty due to chrome peeling off. 
Pontiac G8 in New York, United States
Jan 2009 - Mar 2013
Jun 2009

5000 mi
Clunk in front end, There is a TSB for replacing front sway bar bushing. That has fixed the issue. 
May 2010

16000 mi
Replaced all 4 lower control arms due to a clunk going over bumps 
Pontiac G8 in Michigan, United States
Oct 2008 - Mar 2010
Apr 2009

5500 mi
Engine replaced due to piston slap. 
Jun 2009

8000 mi
Front lower control arms replaced due to faulty ball joints making noise.  
Pontiac G8 in New York, United States
Feb 2009 - Mar 2010
Aug 2009

21000 mi

US $825
thumping noise caused by improperly lubed front end suspension weather-stripping clips from drivers side door bent. Dealer replaced them. 
Pontiac G8 in Arkansas, United States
Feb 2009 - Oct 2009
Sep 2009

5000 mi
The only repair the car had was the trunks secondary actuator failed, causing the trunk to buzz very loudly when you opened it.  
Pontiac G8 in Kansas, United States
Aug 2009 - Mar 2017
Dec 2009

22000 mi
My glove box and trunk lights didn't work, neither did the vanity mirror lights. Glove box and trunk fixed with a fuse, vanity mirror lights needed wiring checked. 
Dec 2010

37000 mi
Faulty TPMS sensor was causing error message. TPMS sensor replaced, no errors since. 
Nov 2011

48000 mi
Rattling cold transmission fixed with TCU and ECU update. 

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2008 Pontiac G8 4dr Sedan

256-horsepower 3.6L V6 5-speed shiftable automatic RWD

Pontiac G8 in Wisconsin, United States
Apr 2010 - Mar 2014
Jul 2013

37500 mi

US $800
replace rear rotors, calipers, pads, rear brakes 
Pontiac G8 in Illinois, United States
Jun 2010 - Mar 2012
Aug 2010

21000 mi
Clunking noise in Right front when hitting bumps. 
Pontiac G8 in Ohio, United States
Sep 2008 - Jun 2009
Feb 2009

3000 mi
Problems with the remote start range. Have to get right up close to vehicle. Replaced fob ...still have the same problem. 
Jun 2009

5000 mi
Problems with the remote start range. Upper and lower control arms! 
Pontiac G8 in Michigan, United States
Sep 2009 - Apr 2016
Oct 2009

20000 mi
Faulty control arms replaced under warranty. 
Mar 2010

32000.0 mi
replacement of door strikers on drivers door, and passenger rear door. 
Apr 2010

35000 mi
replacement of door strikers in drivers door and passenger rear. 
Feb 2011

61300 mi

US $20
Truck latch mechanism (with actuator) purchased by owner and installed by owner. 
Jun 2011

73000 mi
Service engine soon came on for emission issue. This was due to a faulty gas cap. This was previously replaced, but found the replacement was the INCORRECT gas cap! Dealer also cleared the service engine code. 
Apr 2013

100000 mi

US $500
Control arm replacement, upper and lower 
Sep 2015

126000 mi

US $250
Upper and lower control arm replacement in concert with coilover install. Issue found with lower control arms that was making clunking noise. 
Pontiac G8 in Texas, United States
Sep 2010 - Jun 2011
Mar 2011

47000 mi

US $88
Engine light went on. Was able to quickly fix the gas cap problem. 
Pontiac G8 in Iowa, United States
Apr 2011 - Aug 2013
Nov 2011

31000 mi
Rear door lock actuator freezing up on rear passenger side, new actuator put in. Rear driver side starting to act up now. 
Dec 2011

32000 mi
Repaired Driver Rear Door Lock Actuator, finally was cold enough to seize up. 
Dec 2012

45000 mi

US $294
Hood Release Cable broke. Common issue on G8's in Northern states. 
Pontiac G8 in Michigan, United States
Aug 2011 - Dec 2016
Dec 2012

75000 mi
Engine Timing Chain. The chain was stretched and needed to be replaced. Was under warranty. 
Jan 2013

US $250
Side Mirror Controller did not move the mirrors. 
Feb 2013

79000 mi
Ignition key was worn out causing the the key to not turn to the off position to remove the key. Currently using the sapre key and have had no issues. 
Nov 2016

146700 mi

US $129
Replaced interior door latch mechanism, original lever broke. 
Dec 2016

151000 mi

US $3000
Timing chain needed to be replaced. Second time this has occurred, last time it was under warranty at 70k miles. Needed new front pads as they broke off from caliper. Replaced caliper and pads. Also flushed beak line. 
Pontiac G8 in Michigan, United States
Nov 2010 - Apr 2011
Dec 2010

57000 mi
CEL, stretched timing chain. TC replaced by dealer.  TSB lower control arms for 2nd time (no cost) as 1st replacement (32,000mi) did not use new part and rattling again over bumps. N.B New part released by OEM to better cope with salted roads and cold weather. Key fob rubber buttons completely disintegrated after 20 months. 

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2008 Pontiac G8 4-door

6-cylinder automatic 2WD

Pontiac G8 in California, United States
Jan 2012 - Nov 2015
Dec 2013

60000 mi

US $125
Passenger side tie rods, control arm, radius arm worn producing a shake when turning and braking. All were replaced. 
Aug 2014

69700 mi

US $2400
Inner and outer tie rods replaced on driver side. Timing chain stretched. Timing chains replaced. 
Sep 2015

80000 mi

US $60
Rear wheel bearing replaced due to noise and alignment off. 2nd wheel bearing replaced due to residual noise. Replaced sway bar end links due to noise on bumps. 

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2008 Pontiac G8 Repair Histories

See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently 2008 Pontiac G8 problems occur, check out our car reliability stats.