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  1. HELP!! 98 Grand Prix GT Vin K Running Very Rich And Bad Mileage

    Started by BeaSSt, 03-09-2013 09:15 PM
    bad, grand, mileage, prix, rich, running, vin
    • Replies: 2
    • Views: 1,324
    Last Post: 03-09-2013 10:10 PM
    by BeaSSt  Go to last post

    Forum:
    Engine

  2. Getting horrible gas mileage 11 mpg....po420 code

    Started by chevy350, 02-05-2013 11:28 AM
    code, gas, horrible, mileage, mpgpo420
    • Replies: 19
    • Views: 1,312
    Last Post: 02-15-2013 02:49 PM
    by Frosty  Go to last post

    Forum:
    General Grand Prix Discussion

  3. Mileage Failure

    Started by rperry435, 12-11-2012 08:00 AM
    2 Pages •
    1 2
    failure, mileage
    • Replies: 26
    • Views: 3,153
    Last Post: 01-14-2013 09:22 AM
    by PioneerGTP  Go to last post

    Forum:
    1997-2007 4 speed Automatic (4T65E) (4T65E-HD)

  4. Issues with Gas Mileage .. what to do

    Started by x509, 01-02-2013 04:16 PM
    gas, issues, mileage
    • Replies: 5
    • Views: 1,706
    Last Post: 01-03-2013 01:52 PM
    by Fivefingerdeathpunch  Go to last post

    Forum:
    General Grand Prix Discussion

  5. Cold climate engine mileage

    Started by 2004GrandPrixGT1, 12-03-2012 11:57 PM
    climate, cold, engine, mileage
    • Replies: 4
    • Views: 942
    Last Post: 12-04-2012 11:15 AM
    by Fivefingerdeathpunch  Go to last post

    Forum:
    General Tech Discussion

  6. Moved: what are some mods too increase power without hurting gas mileage?

    Started by officialpacecar, 11-07-2012 04:46 PM
    gas, hurting, increase, mileage, mods, power
    • Replies: -
    • Views: -
    Last Post: 11-07-2012 06:20 PM
    by 00GT  Go to last post

    Forum:
    How To Write-Ups/Tech Tips

  7. what are some mods too increase power without hurting gas mileage?

    Started by officialpacecar, 11-07-2012 04:46 PM
    gas, hurting, increase, mileage, mods, power
    • Replies: 4
    • Views: 2,106
    Last Post: 11-07-2012 06:20 PM
    by 00GT  Go to last post

    Forum:
    General Tech Discussion

  8. Crap gas mileage?

    Started by Timing, 09-24-2012 05:54 PM
    crap, gas, mileage
    • Replies: 11
    • Views: 1,831
    Last Post: 09-30-2012 10:42 AM
    by stealthee  Go to last post

    Forum:
    3.8L V6 Supercharged (L67)(L32)

  9. Up for debate p0420 code and bad gas mileage..

    Started by chevy350, 09-20-2012 08:42 PM
    bad, code, debate, gas, mileage, p0420
    • Replies: 13
    • Views: 1,914
    Last Post: 09-22-2012 12:23 PM
    by chevy350  Go to last post

    Forum:
    General Tech Discussion

  10. gas mileage?

    Started by NewBoost1997, 09-06-2012 09:55 PM
    gas, mileage
    • Replies: 4
    • Views: 1,166
    Last Post: 09-07-2012 08:16 AM
    by matt5112  Go to last post

    Forum:
    General Tech Discussion

  11. mileage

    Started by Tyler Sharp, 08-12-2012 07:26 PM
    mileage
    • Replies: 3
    • Views: 1,144
    Last Post: 09-07-2012 08:04 AM
    by matt5112  Go to last post

    Forum:
    Engine

  12. Moved: gas mileage?

    Started by NewBoost1997, 09-06-2012 09:55 PM
    gas, mileage
    • Replies: -
    • Views: -
    Last Post: 09-06-2012 10:01 PM
    by NewBoost1997  Go to last post

    Forum:
    Off Topic Discussion

  13. Better Gas Mileage?

    Started by Adidasdude1989, 08-03-2012 05:05 PM
    3 Pages •
    1 2 3
    gas, mileage
    • Replies: 45
    • Views: 3,566
    Last Post: 08-04-2012 06:37 PM
    by Scottydoggs  Go to last post

    Forum:
    General Tech Discussion

  14. Effect on gas mileage?

    Started by TheNoob23, 06-04-2012 03:55 PM
    effect, gas, mileage
    • Replies: 1
    • Views: 984
    Last Post: 07-23-2012 01:32 PM
    by jakobkay  Go to last post

    Forum:
    3.8L V6 Naturally Aspirated (L36)(L26)

  15. Mileage...

    Started by mick777wauchope, 07-09-2012 08:48 PM
    mileage
    • Replies: 18
    • Views: 1,587
    Last Post: 07-12-2012 09:37 AM
    by indygrandprix  Go to last post

    Forum:
    3.8L V6 Supercharged (L67)(L32)

  16. Help! Gas Mileage Dropping

    Started by bdm1116, 06-14-2012 11:59 AM
    dropping, gas, mileage
    • Replies: 5
    • Views: 1,020
    Last Post: 06-14-2012 08:49 PM
    by CTKGP09  Go to last post

    Forum:
    3.8L V6 Supercharged (L67)(L32)

  17. Gas Mileage Probz.

    Started by betz, 05-19-2012 11:11 AM
    gas, mileage, probz
    • Replies: 8
    • Views: 1,468
    Last Post: 05-20-2012 10:57 PM
    by MBruneaux  Go to last post

    Forum:
    General Grand Prix Discussion

  18. Gas mileage...

    Started by mick777wauchope, 04-30-2012 07:00 PM
    gas, mileage
    • Replies: 4
    • Views: 922
    Last Post: 04-30-2012 07:35 PM
    by Fatboy501  Go to last post

    Forum:
    3.8L V6 Supercharged (L67)(L32)

  19. terrible gas mileage?

    Started by Blue GTP, 04-24-2012 09:27 PM
    2 Pages •
    1 2
    gas, mileage, terrible
    • Replies: 24
    • Views: 2,056
    Last Post: 04-26-2012 06:59 PM
    by Blue GTP  Go to last post

    Forum:
    3.8L V6 Supercharged (L67)(L32)

  20. Horrible Gas Mileage

    Started by Cody Benjamin, 04-18-2012 06:08 PM
    gas, horrible, mileage
    • Replies: 15
    • Views: 1,936
    Last Post: 04-22-2012 01:51 PM
    by Cody Benjamin  Go to last post

    Forum:
    Engine

  21. Gas Mileage decreasing

    Started by CRASHMAN55, 04-15-2012 05:05 PM
    decreasing, gas, gas mileage, mileage, o2 sensor
    • Replies: 16
    • Views: 2,291
    Last Post: 04-15-2012 05:43 PM
    by CRASHMAN55  Go to last post

    Forum:
    General Tech Discussion

  22. The alt rewire mod actually DOES increase fuel mileage!!

    Started by DanGTP, 04-07-2008 05:02 PM
    6 Pages •
    1 2 3 ... 6
    alt, fuel, increase, mileage, mod, rewire
    • Replies: 113
    • Views: 12,648
    Last Post: 04-12-2012 07:31 AM
    by NEONNIGHT34609  Go to last post

    Forum:
    General Tech Discussion

  23. 575,00 one owner miles

    Started by Madness, 04-02-2012 11:28 PM
    575, comet, high, mercury, mileage, miles, owner, sale
    • Replies: 3
    • Views: 1,154
    Last Post: 04-03-2012 07:10 AM
    by BillBoost37  Go to last post

    Forum:
    Off Topic Discussion

  24. What mod point will fuel mileage start suffering

    Started by Elite6, 03-30-2012 12:29 PM
    fuel, mileage, mod, point, start, suffering
    • Replies: 16
    • Views: 1,789
    Last Post: 03-31-2012 10:34 AM
    by gmpowered  Go to last post

    Forum:
    3.8L V6 Supercharged (L67)(L32)

  25. dang mileage,A dd in need of help

    Started by Soviet, 03-30-2011 01:10 PM
    2 Pages •
    1 2
    dang, mileage
    • Replies: 21
    • Views: 2,276
    Last Post: 02-10-2012 10:27 PM
    by firstdue  Go to last post

    Forum:
    Brakes/Suspension/Chassis

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