Car and Truck Fix it Right the First Time Issues
full bulletin at NHTSA ↗2008 Pontiac G6 cruise control problems
severe 16 complaints filed with NHTSA · avg repair $600 · see cruise control across all vehicles →
Failure mileage
Complaints
16
Recalls
0
Avg fix
$600
2crashes
1fire
What stands out
Of the 5 model years of Pontiac G6 we track for cruise control problems, this one carries the most owner complaints on file — 16.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering cruise control on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
ADJUSTABLE PEDALS WILL NOT ADJUST INOPERATIVE. UPDATED 3/13/09. UPDATED 8/1/11.
full bulletin at NHTSA ↗CHEVROLET/PONTIAC/SATURN: INTERMITTENTLY BRAKE LIGHTS (STOP LAMPS) DO NOT FUNCTION CORRECTLY, EXTENDED TRAVEL TO SHIFT OUT OF PARK, CRUISE CONTROL INOPERATIVE, DTCS C0161/C0277 SET (PERFORM REPAIR AS OUTLINED). UPDATED 5/11/11.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The most consistent failure in this cluster is a defective brake light pressure switch that stays active when the brake pedal is released, illuminating brake lights continuously while parked and driving. When you actually brake with light-to-moderate pressure, the lights turn off—the opposite of normal behavior. Owners report this triggers limp-mode logic that disables cruise control, sometimes permanently. One mechanic-owner replaced the switch at a dealer only to have it fail again at 56,000 miles.
Separate from switch malfunctions, owners report cruise control disengaging unexpectedly at highway speeds (50–70 mph) without re-engaging for 20+ miles. Vehicle speed is sometimes restricted to 25 mph or below with a "Reduce Engine Speed" dash message and check-engine light. One diagnostic identified throttle position sensor fault code P2127.
GM Recall 13036 covers 2005–2010 Pontiac G6 models for the brake switch issue, but owners report not receiving recall notices or being told their specific VIN was excluded despite experiencing the identical failure. At least one owner was advised by a Texas dealership that some G6 models were recalled but theirs was not, despite the same symptoms.
Same Pontiac G6 cruise control reports on nearby years: 2007
Failure modes owners describe
Brake Light Switch Malfunction Disabling Cruise Control
The brake light pressure switch activates intermittently when the brake pedal is not being depressed, causing brake lights to illuminate at rest and while driving. This triggers limp-mode logic that disables cruise control. The switch behavior is reversed in light-to-moderate braking—lights stay off until heavy pressure is applied. Tapping the pedal may restore function temporarily before the switch fails again.
When: Occurs at various mileages: reported at 46,000–100,000+ miles; some failures recurring after dealer replacement
Symptoms owners cite: Brake lights illuminated while parked and while driving without brake application; Brake lights turn off during light-to-moderate braking, then illuminate only under heavy braking; Cruise control disables when switch misfires; Traction control and StabiliTrak warnings appear and disable; Warning chime sounds repeatedly
Repairs/costs cited: Dealer replacement of brake light switch documented in at least one case (#8); failure recurred at 56,000 miles after repair
Recalls/TSBs owners mention: GM Recall 13036 applies to 2005–2010 Pontiac G6 models for this issue; some owners report not receiving recall notices or being told their VIN was excluded despite the same failure
Cruise Control Disengagement Without Warning
Cruise control disengages unexpectedly during highway driving. Owner resets control and resumes, or control will not re-engage for extended periods (20+ miles). No diagnostic codes or underlying cause documented in narratives.
When: At 50–70 mph highway speeds; mileages 46,000–100,000+
Symptoms owners cite: Cruise control disengages suddenly while highway driving; Cruise control fails to re-engage immediately or for 20+ miles; Cruise control indicator light turns off
Throttle Position Sensor Fault (P2127) Causing Speed Limiting
Throttle position sensor or pedal switch circuit malfunction triggers limp mode, restricting vehicle speed to 25 mph or below. Dashboard displays 'Reduce Engine Speed' message and check-engine light.
When: At light acceleration and during normal highway throttle application
Symptoms owners cite: Vehicle speed restricted to 25 mph or less despite throttle input; Hesitation and jerking during acceleration; Dashboard message: 'Reduce Engine Speed'; Engine light illuminated
Codes mentioned: P2127
Repairs/costs cited: AutoZone diagnostic identified the fault
Unexpected Engine Speed Reduction and Limp Mode Activation
Engine enters limp mode and reduces power output spontaneously. Vehicle decelerates, warning indicator illuminates, and vehicle barely accelerates. Condition may clear after restart. Owners report engine light and 'Service Traction' warnings.
When: At 50 mph highway speed and at traffic stops; mileages 100,000+
Symptoms owners cite: Vehicle decelerates unexpectedly at highway speed; Speed reduction warning indicator illuminates; Barely accelerates from stops; car feels shaky; Engine light illuminates; 'Service Traction' and 'Engine Power Reduced' messages appear; Condition clears after restart but recurs
Synthesized from 16 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 0 most recent
Had cruise control trouble with your 2008 Pontiac G6?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the cruise control problem on the 2008 Pontiac G6?
It's a meaningful issue. 16 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $600.
At what mileage does the cruise control typically fail?
Across the 15 complaints that reported odometer mileage, most cruise control failures cluster between 54,000 and 84,000 miles, with the median around 67,000. A quarter of owners report trouble before 54,000; a quarter make it past 84,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $600 for cruise control repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to cruise control?
No active recalls currently cover cruise control issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2008/Pontiac/G6.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.