Pontiac G6 Pontiac G6 2008 Cadillac STS Cadillac STS 2006

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Pontiac G6 vs. Cadillac STS Price Comparison (MSRP)

The sticker prices, before adjusting for remaining feature differences. Usually these are the numbers you will see on the window stickers.

Models in short supply often sell at or even above these prices.

Pontiac G6 vs. Cadillac STS Invoice Comparison

Lowest Total Price: $26,990

Pontiac G6 GT   
Difference: $18,690

Lowest Total Invoice: $25,169

Pontiac G6 GT   
Difference: $16,765

Calculate Payments

  Down Payment Interest Rate Term
Model Year20082008200620062006
ModelG6G6STSSTSSTS
TrimGTGXPV6V8STS-V
Body4dr Sedan4dr Sedan4dr Sedan4dr Sedan4dr Sedan
Base Price $23,100 $26,960 $41,020 $47,520 $73,070
Base Invoice $21,830 $25,477 $37,944 $43,956 $67,704
225/50R18 390        
Premium Package 1,475        
Sun and Sound Package 1,100 1,100      
Rear spoiler 200        
Engine-block heater 75 75 100 100 100
Floor mats   80      
Cargo net   45      
Remote start   190      
Sunroof     1,200   1,200
Preferred Equipment Group 1SB     2,640    
225/50R18 324        
Premium Package 1,224        
Sun and Sound Package 913 913      
Rear spoiler 166        
Engine-block heater 62 62 83 83 83
Floor mats   66      
Cargo net   37      
Remote start   158      
Sunroof     996   996
Preferred Equipment Group 1SB     2,191    
Options (change) 3,240 1,490 3,940 100 1,300
Options (change) 2,689 1,236 3,270 83 1,079
Destination 650 650 720 720 720
Gas Tax 0 0 0 0 2,100
Total Price $26,990 $29,100 $45,680 $48,340 $77,190
Total Invoice $25,169 $27,363 $41,934 $44,759 $71,603

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While we strive for accuracy, the site is not error-free, and prices can change at any time.

Dealer Price Quotes

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Request free, no-obligation Pontiac G6 dealer quotes or Cadillac STS dealer quotes from dealers using our car quote form.

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TrueDelta Value Comparison: Pontiac G6 vs. Cadillac STS

Lowest Adjusted Price and Invoice: Pontiac G6 GT
TrueDelta Adjusted Price Difference: $16,255
TrueDelta Adjusted Invoice Difference: $14,530
Model Year20082008200620062006
ModelG6G6STSSTSSTS
TrimGTGXPV6V8STS-V
Body4dr Sedan4dr Sedan4dr Sedan4dr Sedan4dr Sedan
Engine219hp V6252hp V6254hp V6320hp V8469hp V8
TransmissionT4T6T5T5T6
DrivetrainFWDFWDRWDRWDRWD
EPA Fuel Economy (city/highway)/ MPG/ MPG/ MPG/ MPG/ MPG
Audio (watts, speakers)200, 8200, 8?, 8?, 8300, 15
Tire (rear if not all the same)225/50-18225/50-18235/50-17235/50-17255/45-18
Total Price$26,990$29,100$45,680$48,340$77,190
Adjustments for Features0-425-2,435-335-6,490
Feature-Adjusted Total Price$26,990$28,675$43,245$48,005$70,700
Cost Above Minimum$0$1,685$0$4,760$27,455
Total Invoice$25,169$27,363$41,934$44,759$71,603
Adjustments for Features0-400-2,235-310-6,020
Feature-Adjusted Total Invoice$25,169$26,963$39,699$44,449$65,583
Cost Above Minimum$0$1,794$0$4,750$25,884

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Features Comparison: Pontiac G6 vs. Cadillac STS

Model Year20082008200620062006
ModelG6G6STSSTSSTS
TrimGTGXPV6V8STS-V
Body4dr Sedan4dr Sedan4dr Sedan4dr Sedan4dr Sedan
Transmission and Drivetrain 
4-speed manually-shiftable automatic$900    
6-speed manually-shiftable automatic $1100  $1100
5-speed manually-shiftable automatic  $1000$1000 
FWD$0$0   
RWD  $0$0$0
Accessories 
Heated steering wheel    $100
Power-adjustable pedals$125    
Proximity key  $250$250$250
Tilt/telescoping steering wheel, manual$250$250   
Tilt/telescoping steering wheel, power  $350$350$350
Universal garage door opener    $100
Brakes, Airbags, and Other Safety 
Brake assist  $50$50$50
Obstacle detection, rear  $250$250$250
Tires, run-flat    $150
Cargo Management 
Cargo net$40$40  $40
Rear seat pass-through  $100$100$100
Climate Control 
Automatic climate control, front $200$200$200$200
Dual-zone climate control  $125$125$125
Heated windshield washer nozzles    $15
Interior air filter  $0 $0
Rain-sensing wipers  $175 $175
Rear air vents  $100$100 
Rear air vents with manual controls    $150
Variable intermittent wipers$75$75 $75 
Drivetrain 
Limited-slip rear differential    $300
Exterior 
Body kit $0   
Laminated front side windows  $200$200$200
Rear spoiler$200$200  $200
Sunroof$900$900$900 $900
Infotainment 
Aux input$50$50   
Bluetooth cell phone link    $100
CD changer, in-dash$325$325$325 $325
CD player   $125 
DVD-compatible player    $0
Navigation system    $600
Satellite radio$200$200   
Surround sound    $250
Voice control for nav and audio    $100
Instruments, Lights, and Mirrors 
Auto-dimming driver-side mirror  $75$75$75
Auto-dimming headlights    $200
Auto-dimming rearview mirror $150$150$150$150
Compass $0$0$0 
Headlight washers    $50
Heated mirrors  $25$25$25
Turn signals on or near mirrors  $25$25$25
Xenon HID headlights    $500
Seats and Interior Trim 
Aluminum trim   $100 
Center armrest(s), second row  $50$50$50
Folding second row seats$300$300   
Heated front seats$200$200$200 $200
Heated second row seats    $200
Manual lumbar adjuster, driver seat$50$50   
Memory system, driver seat  $200 $200
Power 4-way lumbar adjuster, driver seat  $150 $150
Power 4-way lumbar adjuster, passenger seat  $150 $150
Power fore-aft adjuster, passenger seat  $100$100$100
Power height adjuster, passenger seat  $100$100$100
Power recliner, driver seat  $100$100$100
Power recliner, passenger seat  $100$100$100
Power tilt adjuster, passenger seat  $100$100$100
Synthetic suede inserts in leather seating surfaces    $0
Upholstered instrument panel, leather    $1000
Wood trim  $300 $300
Suspension, Wheels, and Tires 
Alloy wheels   $350 
Auto-leveling rear shocks  $200$200$200
Machined alloy wheels$350    
Performance steering system (optional)$0$0  $0
Polished alloy wheels $350$350 $350
Sport suspension (upgrade)$0$0  $0
Total Value of Features$3,965$4,390$6,400$4,300$10,455
Value of Feature Adjustments$0$425$2,435$335$6,490
Value of Feature Adjustments0-400-2,235-310-6,020

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Specifications Comparison: Pontiac G6 vs. Cadillac STS

Model Year20082006
ModelG6STS
Body4dr Sedan4dr Sedan
Wheelbase112.3 in116.4 in
Length189.1 in196.3 in
Width70.6 in72.6 in
Height57.0 in57.6 in
Curb Weight3,458 lb.3,961 lb.
Fuel Capacity16.4 gal.17.0 gal.
Row 1 Headroom39.0 in38.7 in
Row 1 Shoulder Room55.4 in58.6 in
Row 1 Hip Room52.7 in54.6 in
Row 1 Legroom42.2 in42.6 in
Row 2 Headroom36.5 in37.9 in
Row 2 Shoulder Room55.4 in57.4 in
Row 2 Hip Room51.9 in55.6 in
Row 2 Legroom37.6 in38.3 in
Cargo Volume14.0 ft313.8 ft3

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Option Package Details
Pontiac G6 GT

Premium Package
FeatureValueRequested?
Leather seating surfaces900Yes
Heated front seats200Yes
Power fore-aft adjuster, driver seat100Yes
Power tilt adjuster, driver seat100Yes
Floor mats75Yes
Power-adjustable pedals125No
Cargo net40Yes
Remote start150Yes
Total Requested156593%
Total Not Requested1257%
Sun and Sound Package
FeatureValueRequested?
Sunroof900Yes
CD changer, in-dash200Yes
Total Requested1100100%
Total Not Requested00%

Option Package Details
Pontiac G6 GXP

Sun and Sound Package
FeatureValueRequested?
Sunroof900Yes
CD changer, in-dash200Yes
Total Requested1100100%
Total Not Requested00%

Option Package Details
Cadillac STS V6

Preferred Equipment Group 1SB
FeatureValueRequested?
Wood trim300No
Heated front seats200Yes
CD changer, in-dash200Yes
Power 4-way lumbar adjuster, driver seat150No
Power 4-way lumbar adjuster, passenger seat150No
Rain-sensing wipers100No
Memory system, driver seat200No
Interior air filter0No
Polished alloy wheels0No
Total Requested40031%
Total Not Requested90069%

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